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DATE
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REVISION
LOCATION:
Document created with version :
CONTRACT N° :
SCHEME
01
L1
Main Panel
Cover page
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2016.0.0.114
User data 2
1
0
Brian
Brian
11/15/2017
10/10/2017
Updated wire colors & AWG
EVO Appliance Wiring w/HOT Controls
HW299.2-HW599.2
Figure 2.1 Field Wiring Connections
A. Outdoor Sensor — outdoor air sensor, set point will adjust based on outdoor air temperature (not needed if 0-10 VDC output
is connected)
B. External Sensor Connection — system temperature sensor, senses water temp in a heating loop.
C. Tank Sensor — Sensor for indirect or direct DHW. An aquastat may also be connected here.
D. 0–10 VDC — connect a 0–10 VDC output here to vary set point temperature.
E. Additional Heat Demand — dry contacts that will close a thermostat on an extra heater/boiler if the boiler is at 100% of
capacity.
F. Fault Service — alarm bell or light may be connected here to indicate that the boiler is a hard lockout.
G. Room Thermostat — normally jumped. A room thermostat may be connected here to enable/disable the heater/boiler.
H. Cascade Connection — communication cables get connected here and “daisy chained” to all heaters/boilers in a cascade. This
is polarity sensitive.
I. 3-Way Diverter Valve — Used in a boiler system with both Heating and Indirect Hot Water.
J. P2 — Pump for indirect. Used in
a boiler system with both Heating and Indirect Hot Water.
K. P1 — Wire to primary pump for boilers and heaters.
L. P3 — Wire to system pump for boilers.
Electrical - continued