Raypak HD401 Installation & Operating Instructions Manual page 33

ITEM
Dial
DIP #1
DIP #2
DIP #3
DIP #4
DIP #5
Hydronic with Outdoor Air Reset
For hydronic operation with outdoor air reset, the
System Supply Sensor (S2) is used as the operating
sensor. Boiler Outlet Sensor (S1) is used for boiler out-
let maximum limiting. Boiler Pump (P1) is controlled by
the boiler and is cycled off using a 5 minute fixed purge
delay after burner operation has ceased.
Fig. 25: Hydronic with Outdoor Air Reset
S1 = Boiler Outlet Sensor
S2 = System Supply Sensor
S3 = Outdoor Air Sensor
P1 = Boiler Pump
The DIP switch settings are as follows:
DIP 1 ON (ON/OFF) – OFF (2-STAGE)
DIP 2 ON (OUTDOOR RESET)
DIP 3 ON (WWSD 70°F)
DIP 4 ON (190°F BOIL MAX)
DIP 5 ON (HYDRONIC)
FEATURE
Operating
Reset Ratio 0.4 to 3.6 / Setpoint Target 120°F to 200°F
Temperature
Firing Mode Single Stage (On) / Two Stage (Off)
Configuration Outdoor Reset (On) / Setpoint (Off)
Warm Weather
Active 70°F (On) / Inactive (Off)
Shut Down
Boiler Maximum (dependent on DIP #5) - Default: On
Boiler Max
Outlet Setting o If DIP #5 set to Hydronic (On): 210°F (Off) / 190°F(On)
o If DIP #5 set to Direct DHW (Off): 180°F (Off) / 160°F(On)
Space Heating Direct DHW (Off) / Hydronic (On) - Default: Hydronic (On)
or Direct
Domestic Hot Note: If DIP #5 is set to Direct DHW (Off), the operation is
Water based on Setpoint regardless of DIP #2 setting.
Table O: Outdoor Air Reset Temperature Controller Settings
SETTING / DESCRIPTION
Hydronic, Outdoor Air Reset with
Indirect DHW
For hydronic operation with outdoor air reset and
Indirect DHW, the System Supply Sensor (S2) is used
as the operating sensor. Boiler Outlet Sensor (S1) is
used for boiler outlet maximum limiting. Contact clo-
sure from an aquastat located on an indirect DHW
tank will cause the controller to operate to a boost tem-
perature to satisfy the indirect call for heat. Once the
aquastat opens the controller will return to normal
operation. The indirect pump is operated by an exter-
nal relay (by others). The Boiler Pump (P1) is
controlled by the boiler and is cycled off using a 5
minute fixed purge delay after burner operation has
ceased.
Fig. 26: Hydronic with Outdoor Air Reset
The DIP switch settings are as follows:
DIP 1 ON (ON/OFF) – OFF (2-STAGE)
DIP 2 ON (OUTDOOR RESET)
DIP 3 ON (WWSD 70°F)
DIP 4 ON (190°F BOIL MAX)
DIP 5 ON (HYDRONIC)
33
DEFAULT
Reset Ratio
0.4 to 3.6
Single Stage
(On)
Outdoor
Reset (On)
Active 70°F
(On)
190°F(On)
Hydronic
(On)
and Indirect DHw