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Brute
B
TM
RUTE. BOILERS AND VOLUME WATER HEATERS, 1,000 & 1,200 MBTU/h
as required by code.
The piping should be installed so that each pump
supplies flow only to the heater to which it is
attached.
6B.3 NTV Cold Water Make-Up
The cold water make-up may be connected to the
tank or to the inlet of the boiler as shown in Figures
17-19. Install back-flow preventers and shut-offs
where needed or required by code.
When a water heater is installed above radiation
level, it is required that a Low Water Cut-Off
(LWCO) be installed unless this requirement is
superceded by Jurisdictional requirements.
Location
of pump
NOTES:
1. Optional CWMU & recirculation line location.
2. Locate NTV DHW sensor or remote aquastat well
in lower 1/3 of tank.
3. Back flow preventer may be required - check local codes.
4. Thermal expansion tank may be required - check local codes.
Figure 16. DHW Piping - One Heater, One Vertical Tank
WARNING
Specific instructions for the installation of a Low
Water Cut Off (LWCO) are the following:
Locate the wiring diagram within this manual. On the
wiring diagram, locate the connection points marked
LWCO or Field Interlocks. These are the electrical
connection points for the LWCO. Follow LWCO
Manufacturer's Wiring Instructions.
Mechanically, install the LWCO device in a tee
fitting in the supply piping above the highest point
of the water heater (unless the water heater has
an existing fitting for that purpose). Follow LWCO
Manufacturer's Instructions for minimum pipe sizing.
Note: This water heater is a water tube boiler that
requires water flow through the heat exchanger
for proper operation. It does not have an operating
water level and must be full at all times. In
accordance with ANSI/ASME CSD-1 Section CW-
210 and The National Fuel Gas Code ANSI Z223.1/
NFPA 54 Section 10.3.5 a water tube water heater
shall have a water flow proving device in lieu of a
Low Water Cut Off
4
Expansion
tank
1
WARNING: This drawing shows
3
suggested piping configuration and
valving. Check with local codes and
ordinances for additional requirements.
TPRV
2
Page 25
Supply
Building
return
Expansion
Cold
tank
water
supply
3
4
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