Installer reference guide / Mono tank integrated type 139
NOTE
• The FSV #4022 for booster heater priority should be set to “0” (both) or “2” (booster) to use booster heater.
• If not(backup heater priority), the booster heater can be operated in case of no backup heater demand.
3) Booster Heater Variables for Controlling DHW tank (#303*)
Main Menu
(FSV)
Sub Menu Function Description FSV Step Unit Default Min. Max.
DHW
FSV 30**
Booster Heat
Application 3031 - - 1 (On) 0 (Off) 1
Delay Time 3032 5 min 20 20 95
Overshoot 3033 1 0 0 4
• The FSV #3031 should be set to “1(On)” (Default) to use booster heater as an additional heat source for DHW tank.
• Booster heater startup delay timer : In case of DHW request, this timer will delay the operation of booster heater
compared to heat pump.
– FSV #3032 (Default 20 min., Range 20 ~ 95 min.), In "Power/Forced" DHW mode the delay timer will be neglected,
and the booster starts immediately.
– In “Economic” DHW mode, the DHW heating will be conducted only with heat pump.
– #3032 should be smaller than the maximum H/P time (#3025). If the delay time is set too high, it might take very
long time for DHW heating.
• Temperature difference determining the booster heater OFF temperature (
T
T
s + #3033) : FSV #3033,
• Temperature difference determining the booster heater ON temperature (
T
T
bsh OFF - 2)
Condition Operation
Setting temp.
of DHW > T
HP MAX
T
bsh OFF
(T
S
+#3033)
T
bsh ON
T
HP MAX
Booster heater only
T
S
: Set temperature
T
HP MAX : Max temperature available through a Heat Pump
T
HP ON : Temperature for start (Heat Pump On)
T
HP OFF : Temperature for stop (Heat Pump Off)
T
bsh ON : Temperature at which the booster heater starts to
operate
T
bsh OFF : Temperature at which the booster stop to operate
#3033 : Temperature(overshoot) value for Booster heater
control
Setting temp.
of DHW ≤ T
HP MAX
T
bsh OFF
(T
S
+#3033)
T
bsh ON
Heat Pump & Booster heater together
T
HP MAX
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