Trane Intellipak 2 Service Manual

							Installation
RT-SVX24K-EN61
Complete Tubing and Wiring Connections
as follows:
Air-Cooled Tubing Connection
One piece Air Cooled units are shipped with refrigerant
throughout the entire tubing assemblies.
Two and three piece Air-Cooled low side and condenser sections are shipped with a Nitrogen holding charge. All
service valves are shipped in an open position. Additional
interconnecting tubes (approx. 15-20” in length) will be
supplied with the unit.
Note: Field charging of 2 and 3 piece air-cooled units is
REQUIRED.
To prepare the two or three piece sections for joining install pressure gauges to the appropriate access valve(s)
to verify nitrogen charge is present.
1. Relieve the pressure before attempting to unsweat the “seal” caps.
2. Remove the brackets which support the suction tubes (retain for possible use later for unit reassembly) after
the tubing connections are complete.
3. Place wet rags on the flow/ ball valve on the high side when
 suction tubes are being brazed. Note:
Additional
 care should be taken when brazing near
the wire bundle.
4. Sweat the copper caps off both the high and low side of
 the suction and liquid lines of both circuits. If present
also sweat off the copper caps from hot gas bypass or
hot gas reheat lines.
5. Clean the joints of weld puddles to avoid insertion problems.
6. Cut the appropriate interconnecting tube to a length appro
 ximately 0.75- 1 more than the distance
between the two tubes.
7. Insert the appropriate tube to the complete depth of the bell
 on one side of the joint and align the other
side(prying the high side may be needed). Make sure
the insertion depth is met.
8. Complete the connections by brazing the tubes in place.
Note: R
efrigeration ball valves are intended for general
service and are not a positive shutoff device.
9. Once all connections have been brazed, evacuate the entire
 system. The recommended method for
evacuation and dehydration is to evacuate the system
to 500 microns or less.To establish that the unit is leak-
free, use a standing vacuum test. The maximum
allowable rise over a 15 minute period is 200 microns.
Figure 37. Charge evacuation diagram - evaporative condensers 
						

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62RT-SVX24K-EN
If the rise exceeds this, there is either still moisture in
the system or a leak is present.
10. Charge the system per the unit nameplate field c
 harge.Do not add refrigerant in the suction line at this
time to prevent excessive refrigerant in the low side
prior to compressor startup.
11. At the liquid line angle valve add as much R-410A LIQ
 UID as possible. Depending on conditions, it could
not be possible to add more than 60% of the field
charge. This will be adequate for compressor
startup.More charge will be added after compressors
are started. Use an accurate scale to measure and
record the preliminary amount of R-410A added to
each circuit.
12. With all the circuit compressors operating, SLOWLY meter
 R410-A into the suction line from the LIQUID
charging connection.
Evaporative Condenser Tubing Connection
Important: For units with electric heat, complete tubing
connections AFTER completing wiring
connections. See “Electric Heat Wiring
Connection” on page 63 section.
Important: Complete tubing connections BEFORE
Power and Control wiring connections. See
“Power and Control Wiring Connections”
on page 63section.
There will be a N
2nitrogen charge in the air handler
section. This holding charge should be relieved prior to
removing the caps.
The condenser section will ship with R-410A throughout the entire tubing assemblies. The service valves will be
shipped in an open position. Additional interconnecting
tubes (approx. 15-20 in length) will be supplied with the
unit.
1. To prepare the condensing section for the joining of the two sections, the discharge and liquid line service
valves should be shut and the refrigerant remaining
between the valves and the end caps should be
transferred/recovered.
2. If the unit has been purchased with hot gas bypass or hot
 gas reheat options, those valves should be shut as
well and the refrigerant transferred/recovered from the
sections between the valves and the end caps.
3. Remove the brackets which support the suction tubes (retain
 for possible use later for unit reassembly) after
the tubing connections are complete.
4. Relieve the pressure (charge) for the section of the tubing
 being worked on.
5. Place wet rags on the flow/ ball valve on the high side when
 suction tubes are being brazed.
Note: Additional
 care should be taken when brazing near
the wire bundle. 6. Sweat the copper caps off both the high and low side
of
 the suction and liquid lines of both circuits.
7. Clean the joints of weld puddles to avoid insertion problems.
8. Cut the appropriate interconnecting tube to a length appro
 ximately 0.75- 1 more than the distance
between the two tubes.
9. Insert the appropriate tube to the complete depth of the bell
 on one side of the joint and align the other side
(prying the high side may be needed). Make sure the
insertion depth is met.
10. Complete the connections by brazing the tubes in place.
Note: R
efrigeration ball valves are intended for general
service and are not a positive shutoff device.
11. Once all connections have been brazed, evacuate the low
 side. The low side may be evacuated by the
schrader ports on the discharge line just past the
compressor and the liquid line below the sight glass.
See Figure 37, p.61.
The recommended method for evacuation and
dehydration is to evacuate the low side to 500 microns
or less. To establish that the unit is leak-free, use a
standing vacuum test. The maximum allowable rise
over a 15 minute period is 200 microns. If the rise
exceeds this, there is either still moisture in the system
or a leak is present.
Note: Only after evacuation should the tagged valves be
opened.
WARNING
Hazard of Explosion and Deadly Gases!
Never solder, braze or weld on refrigerant lines or any
unit components that are above atmospheric pressure
or where refrigerant may be present. Always remove
refrigerant by following the guidelines established by
the EPA Federal Clean Air Act or other state or local
codes as appropriate. After refrigerant removal, use dry
nitrogen to bring system back to atmospheric pressure
before opening system for repairs. Mixtures of
refrigerants and air under pressure may become
combustible in the presence of an ignition source
leading to an explosion. Excessive heat from soldering,
brazing or welding with refrigerant vapors present can
form highly toxic gases and extremely corrosive acids.
Failure to follow all proper safe refrigerant handling
practices could result in death or serious injury. 
						

							Installation
RT-SVX24K-EN63
Electric Heat Wiring Connection
Important:For units with electric heat, complete tubing
connections AFTER completing wiring
connections. See “Tubing Connections”
section.
1. Cut and remove wire ties which hold the electric control wires together, remove the shield bracket.
Leave the armaflex on the hole with the control wires.
2. Cut the lowest wire tie which holds the electric heatpower wires to the vertical post on the high side.
3. Route the power wires one by one in to the hole on the low
 side end panel and connect them to the terminal
block inside the electric Junction Box or inside the
extended casing section.
Note: F
or 8 extended casing units, remove the panel (this
panel weighs approximately 60 pounds) next to the
corner post in the low side to locate the terminal
block.
4. Bundle the electric heat power and control wires with armaflex
 wrap on the low side end of the unit. Screw
the shield bracket to compress the wire bundle and
create a good seal. Figure39, p.64
5. Route the electric heat control wires to the Junction bo
 x located on the high side. Figure39, p.64
Power and Control Wiring Connections
Note: Complete Power and Control Wiring Connections
after the tubing connections are complete.
1. Discard the clamps and the wire shield which hold the power and control wires.
2. Make the power and the control wire connections and route
 the wires such that they route straight from the
hole at the bottom of the air handler, turn at right
angles and straight up through the bottom of the high
voltage junction box on the condenser side. Figure39,
p. 64
3. Assemble the louvered panels and the corner panels in the
 condenser side back in place.
4. Screw the side panels to both the air handler and condenser
 side panels to act as filler panels.
5. Finally, assemble the top cover back in place.
WARNING
Proper Field Wiring and Grounding
Required!
All field wiring MUST be performed by qualified personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state electrical codes. Failure to
follow code could result in death or serious injury.
Figure 38. Wire routing at low side end wall
Rain Shield Bracket
Armaflex with 
Wire Ties
Electric Heat Powe
r
and Control Wires 
						

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64RT-SVX24K-EN
General Unit Requirements
The checklist below is a summary of the steps required to
successfully install a Commercial rooftop unit. This
checklist is intended to acquaint the installing personnel
with what is required in the installation process. It does not
replace the detailed instructions called out in the
applicable sections of this manual.
[ ] Check the unit for shipping damage and material
shortage; file a freight claim and notify Trane office.
[ ] Verify that the installation location of the unit will
provide the required clearance for proper operation.
[ ] Assemble and install the roof curb. Refer to the
current edition of the roof curb installer’s guide.
[ ] Fabricate and install ductwork; secure ductwork to
curb. Seal the corners of duct adapters as shown in
Figure 41, p. 66. Ducting attached to the unit should be
self supporting. Do not use the unit to support the
weight of the ducting
[ ] Install pitch pocket for power supply through
building roof. (If applicable)
Figure 39. Wire routing and connections
Electric Heat Power Wires - Routed through the hole 
at the air handler side end wall. Route wires one by one
and connect to the electric heat terminal block. 
Electric Heat Control Wires - Routed through 
the hole at the air handler side end wall. Remove
wire ties at hole area to improve power wire 
routing. Terminate at high voltage junction box. High Voltage Junction Box 
Motor Power Wires are routed through the bottom opening and 
terminated at high voltage junction box. Control wires on the right
side of unit have similar routing. Motor Power Wires and Heater 
Control Wires from the main
control box will be terminated at
the high voltage junction box by
the factory.
Electric Heat
Terminal Block
Figure 40. Sealed ductwork 
						

							Installation
RT-SVX24K-EN65
Rigging the Unit
[ ] Set the unit onto the curb; check for levelness.
[ ] Ensure unit-to-curb seal is tight and without buckles
or cracks.
[ ] Install and connect condensate drain lines to each
evaporator drain connection.
[ ] Remove the shipping hardware from each
compressor assembly.
[ ] Remove the shipping hold-down bolts and shipping
channels from the supply and exhaust fans with spring
isolators.
[ ] Check all supply and exhaust fan spring isolators for
proper adjustment.
[ ] Verify that all plastic coverings are removed from the
compressors.
[ ] Verify all discharge and liquid line service valves
(one per circuit) are back seated.
Main Electrical Power Requirements
[ ] Verify that the power supply complies with the unit
nameplate specifications.
[ ] Inspect all control panel components; tighten any
loose connections.
[ ] Connect properly sized and protected power supply
wiring to a field-supplied/installed disconnect and unit
[ ] Properly ground the unit.
All field-installed wiring must comply with NEC and applicable local codes.
Field Installed Control Wiring
[ ] Complete the field wiring connections for the
constant volume controls as applicable. Refer to “Field
Installed Control Wiring” for guidelines.
[ ] Complete the field wiring connections for the
variable air volume controls as applicable. Refer to
“Field Installed Control Wiring” for guidelines.
Note: All field-installed wiring must comply with NEC
and applicable local codes.
Requirements for Electric Heat Units
[ ] Verify that the power supply complies with the
electric heater specifications on the unit and heater
nameplate.
[ ] Inspect the heater junction box and control panel;
tighten any loose connections.
[ ] Check electric heat circuits for continuity.
Requirement for Gas Heat
[ ] Gas supply line properly sized and connected to the
unit gas train.
[ ] All gas piping joints properly sealed. [ ] Drip leg Installed in the gas piping near the unit.
[ ] Gas piping leak checked with a soap solution. If
piping connections to the unit are complete, do not
pressurize piping in excess of 0.50 psig or 14 inches
w.c. to prevent component failure.
[ ] Main supply gas pressure adequate.
[ ] Flue Tubes clear of any obstructions.
[ ] Factory-supplied flue assembly installed on the unit.
[ ] Connect the 3/4 CPVC furnace drain stubout to a
proper condensate drain. Provide heat tape or
insulation for condensate drain as needed.
Requirements for Hot Water Heat
[ ] Route properly sized water piping through the base
of the unit into the heating section.
[ ] Install the factory-supplied, 3-way modulating valve.
[ ] Complete the valve actuator wiring.
Requirements for Steam Heat
[ ] Route properly sized steam piping through the base
of the unit into the heating section.
[ ] Install the factory-supplied, 2-way modulating valve
[ ] Complete the valve actuator wiring.
[ ] Install 1/2, 15-degree swing-check vacuum
breaker(s) at the top of each coil section. Vent
breaker(s) to the atmosphere or merge with return
main at discharge side of steam trap.
[ ] Position the steam trap discharge at least 12 below
the outlet connection on the coil.
[ ] Use float and thermostatic traps in the system, as
required by the application.
O/A Pressure Sensor and Tubing
Installation
(All VAV units and all units with Statitrac)
Figure 44, p. 68
 O/A pressure sensor mounted to the roof bracket.
 Factory supplied pneumatic tubing installed between
the
 O/A pressure sensor and the connector on the
vertical support.
 Field supplied pneumatic tubing connected to the proper
 fitting on the space pressure transducer located
in the filter section, and the other end routed to a
suitable sensing location within the controlled space.
Condensate Drain Connections
Each unit provides two 1-1/4 evaporator drain
connections on each side of the unit.
Due to the size of these units, all condensate drain
connections must be connected to the evaporator drain 
						

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66RT-SVX24K-EN
connections. Refer to Detail A inFigure 12, p. 25for the
location of these drain connections.
A condensate trap must be installed due to the drain connection being on the “negative pressure” side of the
fan. Install the P-Traps at the unit using the guidelines in
Figure 41.
Pitch the drain lines at least 1/2 inch for every 10 feet of
horizontal run to assure proper condensate flow. Do not
allow the horizontal run to sag causing a possible double-
trap condition which could result in condensate backup
due to “air lock”.
Units with Gas Furnace
Units equipped with a gas furnace have a 3/4 CPVC drain
connection stubbed out through the vertical support in the
gas heat section. It is extremely important that the
condensate be piped to a proper drain. Refer to the
appropriate illustration in Figure 49, p. 73for the location
of the drain connection.
Note: Units equipped with an optional modulating gas
furnace will likely operate in a condensing mode
part of the time.
Ensure that all condensate drain line installations comply
with applicable building and waste disposal codes.
Note: Installation on gas heat units will require addition
of heat tape to the condensate drain.
Removing Compressor Assembly
Shipping Hardware
Each manifolded compressor assembly is rigidly bolted to
a mounting rail assembly. The rail assembly is set on six
(6) rubber isolators.The assembly is held in place by six (6)
shipping “Tiedown” bolts. To remove the shipping
hardware, follow the procedures below:
1. Remove the bolt in each rubber isolator and the slotted
shipping spacer located between the compressor rails
and the unit base rail illustrated in Figure 43, p. 67.
Reinstall the bolts at the same location by screwing
them into the base rail two to three turns only.
2. Ensure that the compressor rail assembly is free to move on the rubber isolator.
Removing Supply and Exhaust Fan
Shipping Channels
Each supply fan assembly and exhaust fan assembly is
equipped with spring isolators. Shipping channels are
installed beneath each fan assembly and must be
removed. To locate and remove these channels, refer to
Figure 42, p. 67 and use the following procedures.
Spring Isolators
Spring isolators for the supply and/or exhaust fan are
shipped with the isolator adjusting bolt backed out. Field
adjustment is required for proper operation. Figure 42,
p. 67 shows isolator locations. To adjust the spring
isolators use the following procedure.
1. Remove and discard the shipping tie down bolts but leave the shipping channels in place during the
adjustment procedure. See Figure 42, p. 67.
2. Tighten the leveling bolt on each isolator until the fan assembly
 is approximately 1/4 above each shipping
channel.
3. Secure the lock nut on each isolator.
4. Remove the shipping channels and discard.
Remove Evaporative Condenser Fan
Shipping Brackets
To remove shipping brackets
Important: Remove fan shipping brackets before
startup. Failure to remove brackets could
result in fan damage.
Evaporative condensers are shipped with fan shipping
brackets to reduce damage caused by vibration during
shipment. The fan shipping brackets must be removed
prior to unit startup.
To remove the shipping brackets start from the side opposite to the drain actuator
(see Figure 113, p. 164):
1. Loosen the screw for the bracket that holds the inlet louvers below the door side.
2. Remove inlet louvers and set to the side.
Note: S
ervice technician may need to step on the
horizontal surface of FRP coated base.
Step with care.
3. Unscrew the bolt in the middle of the door. Keep the bolt
 in a safe place.
4. Lift one door with handle until it touches the top. S
 wivel bottom of door to remove it from the door
opening and set it to the side.
5. Slide and remove the middle mist eliminator section so
 that the shipping bracket is visible.
Figure 41. Condensate trap installation
1-1/4” NPT
female connection
Field supplied 
condensate piping
Cleanout plug
Base rail
Note: Negative static pressure in coil section. 
						

							Installation
RT-SVX24K-EN67
6. Use screw gun to unscrew the two screws that hold the
fan shipping bracket. The bracket should drop down
but still remain engaged with a hook on the bracket.
7. Go to the other side of the unit and follow the procedure
 for inlet louver and door removal
(see steps1-6
 ).
8. Hold the bracket with one hand and remove remaining two
 screws. 9. Remove the bracket and all the removed screws from
the
 unit.
Important: Mak
 e sure there are no screws remaining in
the coil area.
10. Reinstall inlet louvers, mist eliminators and louvers.
11. Check that the direction of arrow on the inlet louver is cor
 rect.
Figure 42. Removing fan assembly shipping hardware
Figure 43. Removing compressor shipping hardware
Note:
Shims are located in the center, and on 
the four corners, of each set of 
compressors. 
						

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68RT-SVX24K-EN
O/A Sensor and Tubing Installation
An Outside Air Pressure Sensor is shipped with all units
designed to operate on variable air volume applications or
constant volume units with 100% modulating exhaust w/
Statitrac.
On VAV systems, a duct pressure transducer and the
outside air sensor is used to control the discharge duct
static pressure to within a customer-specified parameter.
On CV & VAV units equipped with 100% modulating
exhaust w/Statitrac, a space pressure transducer and the
outside air sensor is used to control the exhaust fan and
dampers to relieve static pressure, to within a customer-
specified parameter, within the controlled space. Refer to
Figure 44, p. 68 and the following steps to install the
sensor and the pneumatic tubing.
1. Remove the O/A pressure sensor kit located inside the “ship with” item container. The kit contains thefollowing items:
a. O/A static pressure sensor with slotted mounting bracket
b. 50 ft. 0.188 in tubing
c. Mounting hardware
2. Remove the two roof cap screws and install the provided L mounting bracket as shown in the figure. 3. Place the sensor mounting slotted bracket to the L
mounting
 bracket with the slot located to the top.
4. Install the sensor vertically to the slotted bracket and secure
 it with provided bolt and nut.
5. Connect one end of factory provided tubing to the top por
 t of sensor and pass it through the two slots in the
mount and the other end to the port in the base.
6. Secure the tubing with the mounting hardware located in
 the ship with item container.
Units with Statitrac:
1. Open the filter access door, and locate the SpacePressure and Duct Supply Pressure control devices
illustrated in Figure 45, p. 69. There are three tube
connectors mounted on the left of the solenoid and
transducers. Connect one end of the field provided1/4
(length 50-100 ft.) or 3/8 (length greater than 100 ft.)
O.D. pneumatic tubing for the space pressurization
control to the bottom fitting.
2. Route the opposite end of the tubing to a suitable location
 inside the building. This location should be
the largest open area that will not be affected by
sudden static pressure changes.
Figure 44. Outside air sensing kit
Sensor
Sensor mounting slotted bracket
0.188in OD tubing
L bracket
Sensor mounting screws 
						

							Installation
RT-SVX24K-EN69
Evaporative-Cooled Condenser Make-up
Water and Drain Line Installation
Make-up Water and Drain Lines
Water Supply Source
The supply line should be designed to provide a minimum supply
 of water within customary domestic supply
pressures, 35 to 60 psig; dynamic pressure (measured
with the valve open) which will allow approximately 30
GPM to enter the sump through the makeup water valve,
when the sump is empty. The unit uses about 2-4 GPM.
Attach a hand valve at the inlet for use during inspection and maintenance; an inlet strainer is recommended as
well. Make-up water inlet connection is a ¾ PVC slip
connector. Care must be taken to ensure the water line
upstream of the water solenoid valve will not freeze.
Insulating the line and utilizing heat tape is recommended
if ambient temperatures below 32° F are expected.
Water Quality Overall performance of any water-cooled device can be
af
 fected by suspended particulates, mineral
concentration, trash and debris resulting in clogging and
heat transfer loss. The evaporative-cooled condenser is
designed to greatly minimize problems with these
impurities.
However, float valves and solenoid valves are used to
control the incoming water. If the incoming water contains
contaminants, sand or other objects, an incoming line
strainer with a 80 to 100 mesh screen is required.The inlet line should be flushed prior to connection to the unit,
whether or not there is a strainer.
Note:
Backflow preventer is field installed and should
only be installed by qualified personnel .
Water Drain Schedule 80 PVC pipe of 1¼ is normally adequate for sump water drain. Periodically, the sump is
emptied and flushed to eliminate accumulated dirt, debris,
and minerals. Concentration of these foreign substances
will increase as the system operates.
The evaporative process releases essentially pure water vapor into the atmosphere, leaving the impurities behind
that accumulate in the sump. Although these impurities
are present in the original make-up water, their
concentration will be higher in the sump discharge. Care
and judgment should be exercised when selecting a
discharge site.
Local Site Discharge
Rooftop or simple storm sewer discharge is generally
acceptable.
 Do not routinely direct the sump discharge
onto an area where these higher concentrations will
adversely affect that area, i.e. continued sump discharge
into a flower bed for example, where the input water
contains CaCO3 (lime) will eventually decrease the pH of
the soil.
Sewer Discharge
The quantities of mineral and debris flushed are actually very small, and do not cause problems when diluted in
normal sewer flow. However, local, state or federal
standards and restrictions must be followed in any given
locality.
Figure 45. Space pressure and duct supply pressure tubing schematic 
						

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70RT-SVX24K-EN
Make Up Water Solenoid Valve
This valve is controlled by the UCM based on water level in
 the sump, as well as whether a call for mechanical
cooling exists. During low ambient temperatures, the
solenoid valve will be de-energized preventing water from
further filling sump.The sump drain valve opens to empty
sump of water. Operation can be extended to 10 deg by
providing an optional sump heater.
Drain Valve
The drain valve is shipped to “drain during power loss conditions”.
 If “hold during power loss conditions” is
desired, refer to “Evaporative Condenser Drain Valve
Setup” on page 100
Gas Heat Units
All internal gas piping is factory-installed and pressure leak-tested before shipment. Once the unit is set into
place, the gas supply line must be field-connected to the
elbow located inside the gas heat control compartments.
Access holes are provided on the unit as illustrated in Figure 49, p. 73 to accommodate a side or bottom pipe
entry. Following the guidelines listed below will enhance
both the installation and operation of the furnace.
Note: In the absence of local codes, the installation must
conform with the American National Standard
Z223-1a of the National Fuel Gas Code, (latest
edition).
3. To assure sufficient gas pressure at the unit, use Table 16, p.71as a guide to determine the appropriate
gas pipe size for the unit heating capacity listed on the
unit
 nameplate.
4. If a gas line already exists, verify that it is sized large enough
 to handle the additional furnace capacity
before connecting to it. 5. Take all branch piping from any main gas line from the
top
 at 90 degrees or at 45 degrees to prevent moisture
from being drawn in with the gas.
6. Ensure that all piping connections are adequately coated
 with joint sealant and properly tightened. Use a
piping compound that is resistant to liquid petroleum
gases.
7. Provide a drip leg near the unit.
8. Install a pressure regulator at the unit that is adequate to
 maintain 7 w.c. for natural gas while the furnace is
operating at full capacity.
Note: Gas
 pressure in excess of 14 w.c. or 0.5 psig will
damage the gas train.
Failure to use a pressure regulating device will result in
incorrect gas pressure. This can cause erratic operation
due to gas pressure fluctuations as well as damage the gas
valve. Over sizing the regulator will cause irregular
pulsating flame patterns, burner rumble, potential flame
outages, and possible gas valve damage.
If a single pressure regulator serves more than one rooftop
unit, it must be sized to ensure that the inlet gas pressure
does not fall below 7 w.c. with all the furnaces operating
at full capacity.The gas pressure must not exceed 14 w.c.
when the furnaces are off.
9. Provide adequate support for all field installed gas piping
 to avoid stressing the gas train and controls.
10. Leak test the gas supply line using a soap-and-water solution
 or equivalent before connecting it to the gas
train.
11. Check the supply pressure before connecting it to the unit
 to prevent possible gas valve damage and the
unsafe operating conditions that will result.
Note: Do
not rely on the gas train shutoff valves to isolate
the unit while conducting gas pressure/leak test.
These valves are not designed to withstand pressures in excess of 14 w.c. or 0.5 psig.
Connecting the Gas Supply Line to the
Furnace Gas Train
Follow the steps below to complete the installation
between the supply gas line and the furnace. Refer to
Figure 46, p. 71 ,Figure 47, p. 72 for the appropriate gas
train configuration.
1. Connect the supply gas piping using a “ground-joint” type union to the furnace gas train and check for leaks.
2. Adjust the inlet supply pressure to the recommended 7
 to 14 w.c. parameter for natural gas
3. Ensure that the piping is adequately supported to av
 oid gas train stress.
4. If the through the base gas opening is used, seal off around
 the pipe and the 3 water dam. If the through
the base gas opening is not used, the 3 opening
should be sealed shut to prevent indoor air leakage.
WARNING
Hazardous Gases and Flammable Vapors!
Exposure to hazardous gases from fuel substances
have been shown to cause cancer, birth defects or other
reproductive harm. Improper installation, adjustment,
alteration, service or use of this product could cause
flammable mixtures and result in a fire. To avoid
hazardous gases and flammable vapors follow proper
installation and set up of this product and all warnings
as provided in this manual. Failure to follow all
instructions could result in death or serious injury.
When using dry nitrogen cylinders for pressurizing units for leak testing, always provide a pressure
regulator on the cylinder to prevent excessively high
unit pressures. Never pressurize unit above the
maximum recommended unit test pressure as specified
in applicable unit literature. Failure to properly regulate
pressure could result in a violent explosion, which
could result in death or serious injury or equipment or
property-only-damage.