The printed circuit board within the fan coil contains a timer
circuit that will energize the pump for 5 minutes every 24 hours.
This timer will cycle the pump on potable water systems to flush
the water through the system and prevent any water stagnation.
The timer circuit is equipped with a green light labeled L1 on the
HEB circuit board. Pump timer status is indicated through a flash
sequence, for details on this see below. If you do not need to use
the timer circuit, move the jumper header on “H3” from the ON
pins to the OFF pins and it will be disabled.
Operational Mode Indicator Light
(Flashing Green Light - L1)
Timer Chip - H2 - (Flashing Green Light - L1)
The L1 light also gives a flash code to indicate the mode of
operation that the fan coil is currently operating in (constant fan,
heating, cooling, de-humidification).
Variable Frequency Drive (VFD or Motor Controller)
The HE-B fan coil has been specifically engineered to offer
maximum flexibility for each installation. Constant fan sequence
can be energized from the thermostat and can draw as little as 60
watts of power. The circuit board installed in every HE-B series fan
coil offers two stage heating and cooling outputs to support high
efficiency boilers, condensing units and thermostats when used.
The HEB circuit board also offers four independently adjusted
fan speeds, constant fan, heating, cooling and dehumidification.
Unless you are a trained professional familiar with the functionality
of the circuit board, any adjustments made can seriously hamper
the unit operation and void all warranties.
For wiring details see the HE-B Series Installation Manual or
call Technical Support at 1-888-652-2219.
Module HEB COM
Commissioning & User Guide (8/8)
-8-
-8-
Module HEB-COM-Commissioning-Report-and-User-Guide (8/8)
ON: (ACTIVE)
PUMP TIMER STATUS
ON: (INACTIVE)
OFF:
FAN OPERATION MODE
NO LIGHT
D
W
Y
G
2 SECONDS
2 SECONDS
2 SECONDS
INCREASE AIR FLOW
(CLOCKWISE)
DECREASE AIR FLOW
(COUNTER CLOCKWISE)
FAN ADJUSTMENT TRIM POTS
W1 W2 C
R Y2 Y1 D O/B
G
R
Y1
W2
W1
FZ
FZ
Y2
C
F1
AUXILIAR
Y RELA
Y
(HEA
TING)
L
L
L2
L2
N L1 L1
A3
A2
A1
L
N
COOL
HEA
T
FAN
LED
L1
J8
ON
OFF
H2
TIMER
AUTO
MAN
H3
MODE
ON
OFF
H4
DELAY
J5
J7
J4
U2
J3
R8
R7
R6
G
C
H
F
318.28 Pcbw-001sep-042
J2
N
C
Ri
Ro
H1
J9
J1
LED
L2
PSB CIRCUIT BOARD
THERMOSTAT
24v OUTPUT
EMERGENCY
DISCONNECT
C
Red
+
-
=
=
Light On
Light On
=
=
Light Off
Light Off
The VFD is what controls power output to the fan motor. The
display on the front of the VFD shows power output to the motor
measured in HZ. If the display is constantly displaying an FXXX or
EXX error (Example – F021) contact the manufacturer toll free at
1-888-652-2219 or consult with a factory trained installer.
The following steps should be taken to increase the overall
system performance, and decrease system costs.
There is great benefit with using the constant fan control. This
will reduce the amount of stratified air (hot and cold spots) within
the home, giving you more even temperatures between floors,
as well as providing constant air filtration. The amount of power
actually used with this constant fan operation can be less than a
60w light bulb.
Try to maintain your house temperature within a 5 degree
temperature range. Residential heating/cooling systems are
designed to maintain a set temperature within the home. A big
misconception that people have is to turn off their heating/
air conditioning when they leave the home, and “crank” it up/
down when they get home thinking that this is efficient. For
a residential heating/cooling system to bring up/down the
temperature drastically like this (as an example lets say more
than 5 degrees), the system will have to run much longer than
it would have throughout the day, therefore consuming more
power and making it much more inefficient.
System Efficiency/Performance
NOTES:
On some thermostats there is a “fan switch” which can be set
in the “auto” or “on” position. For best operational efficiency and
comfort, this setting should be set to “on” to run the constant
fan, but can be turned off if desired.
Fan speed priority sequence from highest priority to lowest
priority is listed below:
1 – De-Humidification
2 – Cooling
3 – Heating
4 - Constant Fan
In order for the multi-speed functions on the HE-Z fan
coil to operate, a supporting thermostat must be used.
Sequence of Operation
© 1995-2013 Energy Saving Products Ltd.
© 1995-2013 Energy Saving Products Ltd.
