Zone Controls Wiring Guide

102
Instruction Sheet
HAFC201-4 Hydro Air Fan Controls
Terminal Description:
Thermostat:
C Optional: Common side of transformer W White - Heating signal
to power some styles of thermostats Y Yellow - Condenser signal
R Red - Hot side of transformer used to G Green - Fan signal
switch all functions
Water Coil Aquastat:
TT Connect to aquastat at air handler to control operation of the fan when
in the heating mode. Install a jumper if the aquastat is not used
Freeze Protection Aquastat:
TT Connect to aquastat or thermostat to sense low ambient temperature.
Reduces the chance of pipes freezing by energizing the pump dry contacts.
Pump Dry Contacts:
XX May switch pump directly by bringing in external line voltage or connect
to “T T” on a switching relay.
Boiler Dry Contacts:
XX Connect to the boiler or “T T” terminals on a switching relay.
Air Handler:
C Common side of transformer to power the Fan Control
R Red - Hot side of transformer used to switch all functions
Y Yellow - Condenser signal
One Speed Motor:
G
low
Connect the fan to the relay. Keep the jumper installed between G
high
and G
low
.
Two Speed Motor:
G
high
Remove jumper and connect G
high
to the high speed fan relay and
connect G
low
to the low speed fan relay.
WARNING: Wiring connections must be
made in accordance with all applicable elec-
trical codes. Use copper wire only. 120 VAC
wiring must have a minimum temperature
rating of 75°C. Failure to follow this instruc-
tion can result in personal injury or death
and/or property damage. 12-18 gauge wire
recommended for 120 VAC connections,
14-22 gauge wire for thermostat connec-
tions, and 14-22 gauge wire for 24 VAC
source connections.
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interfer-
ence received, including interference that may cause undesired operation.
Do it Once. Do it Right.
®
TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: [phone] FAX: [phone].
TACO (Canada), Ltd., 8450 Lawson Road, Unit #3, Milton, Ontario L9T 0J8. Telephone: [phone]. FAX: [phone].
Visit our web site at: http://www.taco-hvac.com
Printed in USA
Copyright 2011
TACO, Inc.
Operation:
The Hydro Air Fan Control is an interface
between the thermostat and air handler. It
also has an isolated end switch to start the
boiler and pump. When the thermostat calls
for heat, the Fan Control energizes the end
switch relays and allows the fan to operate at
low speed when the water is above the
optional aquastat setting or time delay has
expired. When the thermostat calls for cool-
ing, the Fan Control energizes the condenser
and operates on high speed. Selectable one,
three or four minute delay on fan operation
in heating mode. Selectable pump exercise
activates circulator but does not enable boiler
contacts. Two minutes every 24 hours mini-
mizes the chance of bacteria build-up in an
open loop system. Thirty seconds every two
weeks minimizes seasonal start-up problems
generally associated with harsh water condi-
tions. Optional aquastat or thermostat can be
connected to Freeze Protection TT terminals
to reduce the chance of pipes freezing by
energizing the pump dry contacts (boiler
contacts not activated.)
Switch Settings:
1 1 minute on fan delay, in heating mode
2 3 minute on fan delay, in heating mode
1&2 4 minute on fan delay, in heating mode
3 Activate pump exercise feature (boiler
contacts not activated)
4 Pump exercise for 2 minutes every 24
hours or 30 seconds every two weeks
External Diagnostics:
The external lights show full functionality of
the Hydro Air Fan Control. The green light
should always be on, indicating that power is
connected. Red lights indicate fan operation
for heating and cooling modes.
HAFC201-4
HYDRO AIR FAN CONTRL
THERMOSTAT
POWER
HEAT CALL
LED
INDICATORS
THERMOSTAT
T
CRWYG
AQUASTATS
TT
HAFC201-4
COOL FAN
HEAT FAN
BOILER
C
AIR HANDLER
XX
R
YG
L G H
WATER
COIL
FREEZE
PROT.
TT
XX
PUMP
1 MIN FAN DELAY 3 MIN FAN DELAY 2MIN/24HR or 30SEC/2WK PUMP EXERCISE
OFF ON
To: Optional
Aquastat on
Return Line of
Hydro Coil
To: Optional Aquastat
or Thermostat to sense
low ambient
temperature
Optional Power Wire
to Thermostat
that Requires 24VAC
NOTE: For 4 minute
ON DELAY of Heating Fan, switch 1 and 3 MIN ON DELAY to ON position.
FAN
RELAY
LINE
24 VAC
OUTDOOR
CONDENSER
UNIT
JUMPER
CIRCULATOR
(or to “T T” on
switching relay)
Dry Contacts To:
“T T” on Boiler
or Switching
Relay
H
N
120 VAC
INPUT
M
HAFC 201 WITH 1 SPEED AIR HANDLER
HAFC201-4
HYDRO AIR FAN CONTRL
THERMOSTAT
POWER
HEAT CALL
LED
INDICATORS
THERMOSTAT
T
CRWYG
AQUASTATS
TT
HAFC201-4
COOL FAN
HEAT FAN
BOILER
C
AIR HANDLER
XX RYG
L G H
WATER
COIL
FREEZE
PROT.
TT
XX
PUMP
1 MIN FAN DELAY 3 MIN FAN DELAY 2MIN/24HR or 30SEC/2WK PUMP EXERCISE
OFF ON
HAFC 201 WITH 2 SPEED AIR HANDLER
To: Optional
Aquastat on
Return Line of
Hydro Coil
To: Optional Aquastat
or Thermostat to sense
low ambient
temperature
Optional Power Wire
to Thermostat
that Requires 24VAC
NOTE: For 4 minute ON DELAY of Heating Fan, switch 1 and 3 MIN ON DELAY to ON position.
OUTDOOR
CONDENSER
UNIT
CIRCULATOR
(or to “T T” on
switching relay)
Dry Contacts To:
“T T” on Boiler
or Switching
Relay
H
N
120 VAC
INPUT
FAN
RELAY
LINE
24 VAC
LOW
HIGH
M
Specifications:
PRODUCT POWER INPUT BOILER RELAY PUMP RELAY DIMENSIONS OF ENCLOSURE
NUMBER RATING RATING WIDTH HEIGHT DEPTH
HAFC201 24 VAC, 60 HZ, CLASS 2 24 VAC, 1 A 1/6 HP 4 7/8" 6 5/8" 2 3/8"
The Thermostat, Aquastat and Air Handler connections are powered by the 24 VAC, Class2 input.