Reznor SDH Parts Manuals - Manual (Page 44)

Form P-PREEVA, P/N 263985R7, Page 44
Sequence of Operation with Optional Fill and Drain
and/or Freeze Protection Kits
Applies to: Float and Pump System with Optional Fill
and Drain Kit (Option CT1, CT2, or CT3)
1) Call for cooling.
2) 2-way valve is energized and closes B to A.
3) 3-way valve energized, opening B to C & closing A to C.
4) During no call for cooling, valves return to normal state.
Applies to: AquaSaver Timed Water System with
Optional Freeze Protection (Option CT5)
1) Call for cooling.
2) 3-way valve energized, opening B to C & closing A to C.
3) If outside air temperature drops below freeze protec-
tion controller setting, 3-way valve is de-energized and
AquaSaver 24V solenoid valve remains energized for
eight minutes to allow complete system water drainage.
4) During no call for cooling, 3-way valve returns to normal
state.
Applies to: Float and Pump System with Optional Fill
and Drain Kit (Option CT1, CT2, or CT3) and Freeze
Protection (Option CT6)
1) Call for cooling.
2) 2-way valve is energized and closes B to A.
3) 3-way valve is energized opening B to C & closing A to
C.
4) If outside air temperature drops below freeze protection
controller setting, valves return to normal state.
5) During no call for cooling, valves return to normal state.
Left Side View
Evaporative
Cooling Module
(Outdoor installation illustrated)
Inlet Water
Connection
Overflow Fitting
3/4” male NPT tapped
with 1/2” female NPT
Drain Fitting
3/4” male NPT tapped
with 1/2” female NPT
2-WAY SOLENOID VALVE
(normally open)
1/2” female NPT
(A 2-way valve is in
Options CT1, CT2, and CT3.
Option CT6 requires
Option CT1, CT2, or CT3.)
To Drain
3-WAY SOLENOID VALVE (valve is suitable for a
maximum close-off pressure differential of 25 psi
and a system static pressure of 300 psi) - 1/2” NPT,
2-position spring return (normally closed at B port)
(A 3-way valve is in Options CT1, CT2, CT3, and CT5.
Option CT6 requires Option CT1, CT2, or CT3.)
Actuator must be above the
valve body when mounted
in horizontal piping.
Roof
Water Inlet
Field-supplied
Service Valve
Field-supplied Pressure
Regulator (if required)
A
A B
B
C
= Field-installed Water Piping
Code
393 -
3-Way
Valve
Code 394 -
Temperature Controller
Code 395 -
Relay
Codes 396
& 397 -
Relay and
Socket
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Form P-PREEVA Version 01-15
Optional Evaporative
Cooling Module
(cont’d)
Evaporative Cooling
Module Optional Fill
and Drain Kits and
Freeze Protection
Controls
CODE Description In Opt P/N
392 2-Way Solenoid Valve
(field-installed)
115V CT1 50032
208V CT2 50297
230V CT3 50299
393 3-Way Solenoid Valve
(field-installed)
115V CT1 50033
208V CT2 50296
230V CT3 50298
24V CT5 178677
394 Temperature Controller* CT5 and CT6 126170
395 Time Delay Relay* CT5 89661
396 Relay* CT5 211411
397 Relay Socket* CT5 211415
*Factory-installed in the AquaSaver junction box.
®