Laars Heaters
1. Turn power off to heater.
2. Remove factory jumper from terminal block.
3. Wire OnCommand to the heater as shown.
4. Ensure toggle switch is in the ON position.
5. Set heater thermostats to maximum position.
Hayward Heaters
Refer to the instructions in the heater manual for “2-wire Remote Thermostat” operation under “Remote Control
Connections” and the diagram below:
1. Turn off power to heater.
2. Wire OnCommand to terminals 1 & 2 (see diagram).
3. Leave jumper attached to terminals 4 & 5.
4. Move “BYPASS” dipswitch on heater circuit board to “ON” position (up).
5. Turn heater power back on.
6. Switch heater to either “Pool” or “Spa” (it doesn’t make any difference which is selected, the OnCommand will
take control).
7. Heater display should be “bO” (for “bypass On).
8. Heater will fire whenever OnCommand requests (when OnCommand “Heater” LED is illuminated).
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Heater Config.
+ to view/change
Heater
Disable
Heater Cooldown
Disabled
Heater Extend
Disabled
Push to access heater options
Toggle between Enabled and Disabled (default) Heater
Toggle between Enabled and Disabled (default) Heater Cooldown
Toggle between Enabled and Disabled (default) Heater Extend
Move to previous/next configuration menu
Move to next menu item or previous/next configuration menu
Move to next menu item
Move to previous/next configuration menu
if “Heater1” is enabled
if “Heater1” is enabled
Allow Low Speed
Disabled
Toggle between Enabled and Disabled (default)
Move to next menu item or previous/next configuration menu
if “Heater1” is enabled and
1-speed filter pump is not selected
Heater
If the heater is “Enabled”, the heater relay will turn on when the water temperature is less than the
desired temperature setting and the filter pump is running. The desired temperature is in the “Settings
Menu”. If applicable, the homeowner will be prompted to enter separate “pool” and “spa” settings.
Depending on the position of the pool/spa suction valve, the proper temperature setting will be used.
Heater Cooldown
This feature ensures that the heater cools down before water circulation is stopped. When enabled,
the OnCommand will continue to run the filter pump for 5 minutes after the heater turns off. During
this period the filter pump LED will flash and also a “Heater Cooldown, X:XX remaining” message will
scroll on the display.
When the filter pump is running and the heater is on: Pressing the “Filter” button once will cause the
heater to turn off, but the filter pump will continue to run for heater cooldown (filter LED flashing and
message on display). Pushing the filter button a second time will override the heater cooldown
operation and turn the filter pump off.
Heater Extend
If “Enabled”, the filter extend logic keeps the filter pump running beyond the normal turn-off time until
the pool (or spa) is heated up to the desired temperature setting (see Settings Menu). Heater extend
will NOT cause the filter pump to turn on, it will only delay the turn off time when the heater is
operating.
Allow Low Speed
This menu only appears if the filter is configured for 2-speed or variable speed operation. During
default operation, high speed mode is used whenever the heater is on. If Allow Low Speed is enabled,
low speed will be allowed even if the heater is on.
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to limit switches
remove jumper
Fusible Link
white
white
Do not remove jumper
Terminal block located at
electrical junction box
Dipswitch located on heater
circuit board
PK
W
R
BK
R
ON
ºC
OFF
ºF
