Field Gas Piping - Daikin Rebel Applied DPSA Installation And Start-Up Manual

Field Gas Piping

Use a stabilizing wrench when intalling field gas piping in order to prevent
damage to the factory supplied manifold assembly.
Read Carefully. Testing for gas leaks with an open flame can cause an
explosion or fire resulting in property damage, personal injury, or death. Us
a commercially available soap solution made specifically for the detection
of leaks to check all connections.
Overheating or failure of the gas supply to shut off can cause equipment
damage, severe personal injury, or death. Turn off the manual gas valve to
the appliance before shutting off the electrical supply.
Gas Explosion Hazard—Read Carefully.
Do not attempt to connect gas lines to the condensate drain nipple. Open
furnace vestibule and positively identify the proper gas manifold connection
point. Failure to connect gas lines to the proper gas manifold connection
point may result in serious injury or death.
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CAUTION
DANGER
WARNING
WARNING
Figure 81: DPSA Gas Furnace Field Connection Detail
1. Follow all applicable NFPA and local code requirements
for isolation, traps, and more between the regulator and
unit manifold. Ensure pipe routing does not interfere with
downstream access doors and general unit accessibility.
Suggested routing and items shown in
that two nipples connections are provided at the furnace
section. The upper pipe nipple is the fuel gas supply
connection and is sized based on unit input capacity. See
Table 19. The lower, ¾" NPT nipple is connected to the
vestibule condensate drain pan. Only connect gas to the
unit gas supply connection point.
2. Field piping to be installed and supported such that it
does not generate any load on the Factory supplied gas
manifold(s).
3. The appliance must be isolated from the gas supply
system by closing off the manual shut off valve during
any pressure testing less than 0.5 psi (3.5 kPa) of the
gas supply piping system.
4. The appliance and its individual shut-off valve must be
disconnected from the gas supply system during any
pressure testing greater than or equal to 0.5 psi (3.5
kPa).
5. Regulator to be sized for the maximum total Btu input
required for the heater(s).
Table 21: DPSA Gas Furnace Fuel Pipe Sizing
Furnace Capacity
200MBH, 400MBH, 600MBH
800MBH, 1125MBH
89
Unit Maintenance
Figure
Gas Pipe Size
1.25" NPT
1.5" NPT
IM 1287 • REBEL APPLIED ROOFTOP
68. Note