Direct Heating Piping Diagram - heat-timer Mini-MOD-CNC Installation And Operation Instructions Manual

34 Heat-Timer Corp.
ModulatIng and sequencIng BoIlers

dIrect HeatIng pIpIng dIagraM

120VAC
Boiler 1
Condensing
Modulating
system:
The Mini-MOD-CNC operates 2 modulating boilers and 2 On/Off Boilers. The boilers are piped in Reverse Return on the
primary loop. The System output is controlling the System Pump.
Heat-Timer Corp. is aware that each installation is unique. Thus, Heat-Timer Corp. is not responsible for any installation
related to any electrical or plumbing diagram generated by Heat-Timer Corp. . The provided illustrations are to
demonstrate Heat-Timer Corp. 's control operating concept only.
Mini-MOD-CNC
Condensing and Non-Condensing
OUTPUT RATINGS: SYSTEM
120VAC, 6A RESISTIVE
25 o 145
A OD= F SYS=
1A PILOT DUTY, 15A TOTAL
FOR ALL CIRCUITS
INPUT RATINGS: B
<<A>> B <C>
115VAC 60Hz , 30VA MAX
C 100% 52% ---
USE COPPER WIRE,
CLASS 1 WIRE ONLY.
D
CAUTION : RISK OF ELECTRIC SHOCK
More than one disconnect switch may be required
to de-energize the equipment before servicing.
DO NOT APPLY ANY VOLTAGE
PROGRAM RUN
TO INPUT TERMINALS
Boiler 2
Condensing
Modulating
System
Sensor
Building Heating Loop
Outdoor
Sensor
o
F
D
---
Boiler 3
Non-Condensing
Sequencing
Boiler 4
Non-Condensing
Sequencing