Page 24
OMNI by EconoHeat
7. Integrated system, single or multiple heating zones, using circulating pumps rather than zone valves:
Each pump will require a separate relay (Honeywell R845A or White Rodgers 828A-845, or equivalent).
Install a flow control valve in each zone including the indirect water heater to prevent gravity circulation.
Install a balancing valve in each zone and adjust so that flow in each zone is about the same. (see Figure
24.) While this basic system does not provide priority for domestic hot water, priority can be provided as
shown in Wiring Section, Figure 27.
8. Combination heating/
cooling system with chilled
water:
The chiller must
be piped in parallel with
the boiler and isolation
valves installed to prevent
the chilled water from
circulating through the
boiler and heated water
from circulating through the
chiller. See Figure 25.
Figure 24
Figure 25
Circulation Pump
Cold Water
Feed
Shutoff Valve
Return
from
System
Supply to
System
Drain Cock
Indirect Water Heater
(Storage Tank with Coil)
Flow Control Valves
S
R
Flow Check
Cold Water
Feed
Insulation
Valve #4
Return
from
System
Supply to
System
Drain Cock
Chiller
Circulation Pump
S
R
Insulation
Valve #4
Insulation
Valve #4
