50
HAFC201 with 2 Speed Air Handler
THERMOSTAT
Optional Power Wire
to Thermostat
that Requires 24VAC
To: Optional
Aquastat on
Return Line of
Hydro Coil
Power On
Call for Heat
Fan, Cooling
Fan, Heating
Outdoor
Condenser
Unit
TT
BOILER
AIR HANDLER
G G
XX C R Y
C RG
Y
W
THERMOSTAT
AQUASTATS
HAFC201
HYDRO AIR FAN CONTROL
T
T
WATER COIL FREEZE PR
To: Optional Aquastat
or Thermostat to sense
low ambient
temperature
Hot
Neutral
Circulator
X
X
PUMP
5 AMP 1/6 HP RATED
DRY CONTACTS
1 MIN ON DELAY - FAN
3 MIN ON DELAY - FAN
2 MIN @ 24 HR - PUMP
30 SEC @ 2 WK - PUMP
OFF ON
(or to “T T” on
switching relay)
HAFC 201 WITH 2 SPEED AIR HANDLER
(Both HFC 101 and HAFC 201 are
capable of 1 and 2 speed applications.)
“T T” on Boiler
or Switching
Relay
M
Low
High
Line
24 V
A
C
Fan
Relays
LOW HIGH
T
NOTE: For 4 minute
on delay of Heating Fan,
switch 1 and 3 MIN ON
DELAY to ON position.
