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GAS-FIRED HEATER Installation Manual
MUNCHKIN CONTENDER PIPING
(CONTINUED)
J. ZONING WITH ZONE VALVES
1. Connect heater to system as shown in 1A
and 1B in Piping Details when zoning with
zone valves. The primary/secondary piping
shown ensures the heater loop will have
sufficient flow. It also avoids applying the
high head of the heater circulator to the zone
valves.
2. Connect DHW (domestic hot water) piping to
indirect storage water heater as shown.
K. ZONING WITH CIRCULATORS
1. Connect heater to system when circulator
zoning as shown in 1C and 1D in Piping
Details when zoning with circulators. The
heater circulator cannot be used for a zone. It
must supply only the heater loop.
2. Install a separate circulator for each zone.
3. Connect DHW (domestic hot water) piping to
indirect storage water heater as shown.
L. MULTIPLE HEATERS
1. Connect multiple heaters as shown in 1E and
1F in Piping Details.
2. All piping shown is reverse return to assure
balanced flow through the connected
heaters.
3. Each connected heater must have its own
circulator pump to assure adequate flow.
4. Connect DHW (domestic hot water) piping to
indirect storage water heater as shown.
CAUTION
It is highly recommended that you carefully
follow the glycol manufacturer’s recommended
concentrations, expansion requirements and
maintenance recommendations (pH additive
breakdown, inhibitor reduction, etc.). You must
carefully figure the additional friction loss in the
system as well as the reduction in heat transfer
co-efficients.