AERCO Esteem O&M Manual - Manual (Page 41)

35
Installation Compliance
All field wiring made during installation must
comply with:
• National Electrical Code NFPA 70 and any
other national, state, provincial or local
codes or requirements.
• In Canada, CSA C22.1 Canadian Electrical
Code Part 1, and any other local codes.
WARNING!
ELECTRICAL SHOCK HAZARD. B
EFORE
MAKING ANY ELECTRICAL CONNECTIONS TO THE
E
STEEM
399 L
OW
NO
X
,
DISCONNECT ELEC
-
TRICAL POWER SUPPLY AT THE SERVICE PANEL
.
F
AILURE TO COMPLY CAN CAUSE SEVERE PER
-
SONAL INJURY OR DEATH
.
Line Voltage Connections
1. Use shielded cable.
2. Connect a 120 VAC/15A service to the
120V terminal strip on the wiring panel
below the Esteem 399 Low NOx control
module, as shown in Figure 20, page 34.
3. Route the incoming 120 VAC power wire
through the provided openings in the bot-
tom jacket panel.
4. The unit is provided with a service switch
located on the front panel, check local
code requirements for compliance.
N
OTICE
If local codes or conditions require an
additional service switch, the installer
must install a fused disconnect for 15
amp (minimum) service switch.
Domestic Hot Water Aquastat Wiring
N
OTICE
Use only AERCO International supplied
aquastat (P/N 69107). Other models
can be incompatible with the Esteem
Controller
1. Connect the DHW thermostat (aquastat)
to the 24V terminal strip on the wiring
panel located below the Esteem 399 Low
NOx control module as shown in Figure
20, page 34.
2. Route all wiring through the pro-
vided openings, in the bottom jacket
panel. Allow enough wire for access
panel to swing open during servicing.
Thermostat Wiring
1. Connect room thermostat or the end
switch (isolated contact only) of a relay
control panel to the 24V terminal strip on
the wiring panel below the Esteem 399
Low NOx control module, as shown in
Figure 20, page 34.
2. For proper operation install the room
thermostat on an inside wall away from
influences of heat and cold, i.e. water
pipes, areas of draft, lighting fixtures and
fireplaces.
3. Set the thermostat anticipator (if appli-
cable) as follows:
• Set for 0.2 amps when wired directly to
the Esteem 399 Low NOx .
• Set to match the total electrical power
requirements of the connected devices
when wired to zone relays or other
devices. Refer to the relay manufactur-
ers’ specifications and the thermostat
instructions for additional information on
the anticipator setting.
N
OTICE
When making low voltage connections
to the Esteem 399 Low NOx, ensure no
external voltage is present in the ther-
mostat circuits. If external voltage is
present, provide an isolated contact to
prevent damage to the control.
Chapter 9 External Wiring
GF-125