COMBOMAX
MC
Electric boiler Set-up, use and care guide
(revised Oct 2015)
, Page
9.
The transformer used to power the zone valves
must be of sufficient capacity to handle the load
represented by all zone valves.
3.9.3 Multiple circulator zoning
Connect the low-voltage thermostat to the relay
(Honeywell #RA-889, RA-89A, RA-845A). The
components must wired such that, upon a
heating signal from a thermostat, only the
corresponding circulator will be activated. See
figure below
Diagramme électrique/ Wiring diagram
Raccordement de multiples circulateurs/ Wiring for multiple circulators
Thermostat
Zone 1
T
T
1
2
3
5
4
6
Relais/Relay
RA832A
T
T
1
2
3
5
4
6
Relais/Relay
RA832A
L2
L1
Thermostat
Zone 2
Circulateur/
circulator
Zone 1
Circulateur/
circulator
Zone 2
electrical service
120Vac
T
T
Note 1
Note 1 Block terminal sur
panneau électrique COMBOMAX/
Terminal block : thermostat on
COMBOMAX electric pannel
3.10 BI-ENERGY SETUP
To take advantage of a special domestic electric
utility rate, your COMBOMAX
MC
boiler can be
combined with an existing oil or gas-fired
furnace. Please contact your utility to make sure
your building is eligible and to find out about the
new wiring configuration. Please refer to figures
7 and 8 for the set-up required.
The CBE-EM bi-energy switching control
(available as an option) is especially designed to
satisfy utility requirements. The CBE-EM control
selects the cheapest energy source according to
the outdoor temperature, the indoor temperature
setting and any signal provided by the utility.
The CBE-EM bi-energy control starts up the oil
burner upon receiving the appropriate signal,
even if the thermostat is sending no heating
signal. The oil burner stops when the boiler
reaches its high-limit point. For this reason, the
plumbing system must be equipped with a flow
check valve or zone valves.
If the CBE-EM control is used with a 3-way
motorized vale (1’’ NPT F), it will directs the
heating water flow to the oil burner or the
COMBOMAX
MC
unit depending on the signal
sent to it by the external bi-energy sensor. Thus,
your oil burner can cool down while eliminating
energy losses up the chimney or by conduction
in the furnace room .
Содержание COMBOMAX 23-10
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