Piping The Boiler - NTI TRX II Series Installation Start-Up Maintenance

D. Piping the Boiler
NOTE: Observe the minimum 1" clearance around all uninsulated hot
water pipes when openings around pipes are not protected by non-
combustible materials.
A - Central Heating Supply
B - Supply to Indirect Water Heater
C - Gas Inlet
D - Not Used
E - Central Heating Return
I - Condensate Discharge
Figure 11 - Water / Gas Connections
TRX Series 2 - Installation - Startup - Maintenance Instructions
C
A
B
TRX150 TRX199
1-1/4"
3/4" (Cap if not in use)
3/4"
1-1/4"
CAUTION
Non-Combi Models should not be operated as a direct potable
hot water heater. Only Combi Models should be used to directly
heat hot water.
Use at least the MINIMUM pipe size for all appliance loop piping.
This is to avoid the possibility of inadequate flow through the
appliance. Using less than the required minimum pipe size and piping
could result in system problems, property damage, and premature
appliance failure. Such problems ARE NOT covered by product
warranty.
E
D
A - Central Heating Supply
B - Domestic Hot Water Outlet
C - Gas Inlet
D - Domestic Hot Water Inlet
E - Central Heating Return
I - Condensate Discharge
Part 4 - Water Piping
F
TRX199C
1-1/4"
3/4"
3/4"
3/4"
1-1/4"
23