28
External Wiring
Additional 24V Limit Wiring
The MODULATING DELTA provides 24V
terminal connections for additional limit con-
trols. These limit terminal connections will
provide a "hard" lockout requiring a manual
reset of the control, or a “soft” lockout in
which the control will automatically reset.
For limit control requiring a manual reset (hard
lockout) remove jumper and use low voltage
terminals 11 and 12.
For limit control that will reset automatically
when the condition is corrected (soft lockout)
remove jumper and use low voltage terminals
13 and 14.
System Circulator - Zone Valve Application
To energize the system circulator shown as
Item 5 in Fig. 8 page 19 reference Fig. 14.
Installer to provide a Transformer / Relay such
as Honeywell R8285 or equivalent and Zone
Valves with isolated end switch such as
Honewell V8043 or equivalent.
Storage Tank Recirculation
To energize the recirculation circulator
between the MODULATING DELTA and a
storage tank as shown as Item 7A in Fig. 6 page
13 reference Fig. 18 page 31. Installer to pro-
vide a transformer/relay such as Honeywell
R845A or equivalent.
24 V
Transformer
by Others
Honeywell V8043
Zone Valves
or Equivalent
Honeywell R8285D
Transformer / Relay
or Equivalent
Low Voltage Terminal Strip
System Circulator
24V Low Voltage Wiring
120V High Voltage Wiring
Room Thermostats
H
N
120V
R
C
G
1
3 4
6
7
8
To MODULATING DELTA
Fig. 14: Secondary System Circulator Wiring
