Lochinvar SNR200-100 用户手册

ELECTRICAL SHOCK HAZARD – For 
your safety, turn off electrical power supply 
before making any electrical connections 
to avoid possible electric shock hazard.  
Failure to do so can cause severe personal 
injury or death.

Wiring must be N.E.C. Class 1.  

If original wiring as supplied with the 
water heater must be replaced, use only 
type 105°C wire or equivalent.

The water heater must be electrically 
grounded as required by National 
Electrical Code ANSI/NFPA 70 – latest 
edition.

1.  National Electrical Code and any other national, state, 

provincial, or local codes, or regulations.

2.  In Canada, CSA C22.1 Canadian Electrical Code Part 1, and 

any local codes.

This water heater is designed to operate with 120 VAC and 60 
Hz power supply.  If allowed by local codes, connect the power 
cord provided with the heater to a GFI protected outlet on a 
separate circuit and breaker (15 amp recommended). Ensure 
the circuit cannot be interrupted by a switch used to control 
lights or other appliances.

If local codes do not allow for the use of the power cord, remove 
the cord from the junction box found on the side of the control 
support bracket (FIG. 7-2) and attach conduit to the junction 
box. Route the wires out of the appliance to a GFI protected 
outlet on a separate circuit and breaker (15 amp recommended).  

Label all wires prior to disconnection 
when servicing controls. Wiring errors can 
cause improper and dangerous operation.

 WARNING

 CAUTION

LOW VOLTAGE
WIRING KNOCKOUTS

1.  When the operation of an external limit needs to be 

verified before the water heater fires, remove the jumper 
wire from terminals X & B and connect them to the 
contacts on the external limit (FIG. 7-3).

1.  Route all low voltage wires through the knockouts in the 

rear of the water heater,  as shown in FIG. 7-1.

2.  Connect low voltage wiring to low voltage connection 

board as shown in FIG. 7-3 on page 44 of this manual and 
the water heater wiring diagram.

The electronic control closes a set of dry contacts whenever the 
burner is running.  This is typically used by Building Management 
Systems to verify that the water heater is responding to a call for 
heat.

The electronic control closes another set of contacts whenever 
the water heater is locked out or the power is turned off. 

 

This can be used to turn on an alarm, or signal a Building 
Management System that the water heater is down. Note that 
the alarm contacts will close momentarily after each call for 
heat.

       

Installation & Service Manual

TM

JUNCTION BOX

Use of an extension cord is NOT allowed.  If 
a suitable electrical outlet is not within reach 
of the supplied power cord, a new receptacle 
must be installed or the power cord must 
be replaced with hard conduit as described 
above.

 WARNING