ECR Olsen OQ95M-200, Installation, Operation & Maintenance Manual

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10 - ELECTRICAL WIRING
10.6 Thermostat
1. Connect room thermostat or end switch (isolated
contact only) between terminals T1 and T2.
2.
Install thermostat on inside wall away from infl uences
of drafts, hot or cold water pipes, lighting fi xtures,
televisions, sun rays, or fi replaces.
3. Thermostat anticipator (if applicable)
A. Set for 0.1 amps if connected directly to boiler.
B. Set to match total electrical power requirements of
connected devices if connected to relays or other
devices. See device manufacturers’ specifi cations
and thermostat instructions for details.
10.7 Outdoor Temperature Sensor
1.
Connect outdoor temperature sensor between terminals
A1 and A2 to enable outdoor reset operation of the
boiler. If fi xed temperature operation is required, do
not install outdoor sensor.
2.
Mount sensor on exterior wall, shielded from direct
sunlight or fl ow of heat or cooling from other sources.
3. If desired, install a summer/winter switch across
terminals A1 and A2. When the switch is closed, the
boiler (space heating) circulator is disabled.
4.
Route sensor wires through the holes provided on the
right jacket panel of the boiler.
10.8 DHW Limit Control
Connect storage indirect water heater (DHW) limit control
between terminals DHW T1 and DHW T2.
See Piping and Wiring Appendix for wiring and piping
diagrams.
AVOID THE FOLLOWING
Dead Spots
Corners
Alcoves
Behind doors
Cold Spots
Concealed pipes or ducts
Stairwells - drafts
Unheated rooms on the other side
of the wall
Hot Spots
Concealed pipes
Fireplaces
TVs or radios
Lamps
Direct sunlight
Kitchens
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