Dunkirk Helix VLT Vertical Laser Tube, Wall Hung Modulating Condensing Boiler - Manual (Page 12)

12
SECTION B
Stainless Condensing boiler working with LOW
Temperature Heating Device
B1. Pipe The System
1-1. Pipe the heating system and install all required
components following requirements of the
Additional Heating Device.
1-2. Connect Additional Heating Device and Stainless
Condensing boiler together as shown in Figure B1,
if the Additional Heating Device is a closed system
(can be pressurized).
If the Additional Heating Device is an open system
(CANNOT be pressurized), pipe the Stainless
Condensing Boiler and Additional Heating Device as
shown in Figure B2.
1-3. All piping requirements of Additional Heating Device
shall be satisfied. Refer to installation and operation
manuals of the Additional Heating Device.
1-4. Manufacture recommends use of The Additional
Heating Device bypass valve. The bypass valve
should be closed when Additional Heating Device
is used. When Additional Heating device does not
supply heat for extended period of time, open this
bypass valve. This is important when Additional
Heating Device is an outdoor device. Water from
the system will not be cooled from circulating
through the unused system.
1-5. Install the expansion tank at the upstream (inlet)
side of the system pump.
B2. Connect Electrical Wires
2-1. Follow the instructions in Additional Heating Device
manuals when wiring
(1) all high voltage wires
and
(2) low voltage wires other than Call For Heat wire.
2-2. Follow instructions in Installation, Operation and
Maintenance Manual of the Stainless Condensing
boiler when connecting
(1) all high voltage wires
and
(2) Low voltage wires other than the Call For Heat
wire.
2-3. Power the system pump by heating zone control
board if applicable. If there is no heating zone
control board in the heating system, power the
system pump with the Stainless Condensing boiler.
Use relays to prevent current over draw.
2-4. All zone pumps and zone valves should be
controlled by either the heating zone control board
or the Stainless Condensing boiler.
2-5. If there is a Low Limit control on the Additional
Heating Device, such low limit control has to be
removed or deactivated.
B3. Connect CH Call For Heat Wire
3-1. Install supplied call for heat control, AR822, onto
wall.
3-2. Remove jumper in AR822 between Terminal-L1 and
Terminal-3.
3-3. Connect Additional Heating Device and Stainless
Condensing boiler. Refer to Figure B3.
• Connect two wires, from room thermostat or
from zone control board, to input T-Terminals
(Terminal-R and Terminal-W) in AR822.
• Connect Terminal-5 and Terminal-6 in AR822 to
Stainless Condensing boiler CH T-T terminals.
• Connect Terminal-3 and Terminal-4 in AR822 to
CH T-T input of Additional Heating Device.
3-4. Connect line voltage wires to Terminal-L2 and
Terminal-L1 in AR822.
B4. Connect DHW Call For Heat wire, if applicable
4-1. Install one of the supplied call for heat controls,
AR822, onto wall.
4-2. Remove jumper in AR822 between Terminal-L1 and
Terminal-3.
4-3. Connect Additional Heating Device and Stainless
Condensing boiler. Refer to Figure B4.
• Connect two wires, from hot water tank
thermostat or from zone control board, to input
T-Terminals (Terminal-R and Terminal-W) in
AR822.
• Connect Terminal-5 and Terminal-6 in AR822 to
Stainless Condensing boiler DHW T-T terminals.
• Connect Terminal-3 and Terminal-4 in AR822 to
DHW T-T input of Additional Heating Device.
• Connect line voltage wires to Terminal-L2 and
Terminal-L1 in AR822.
B5. Setting the Additional Heating Device
5-1 Set CH Supply Temperature Setting of Additional
Heating Device to value close to maximum possible
setting, i.e. 160°F.
5-2 Set DHW Supply Temperature Setting of Additional
Heating Device to value close to maximum possible
setting, i.e. 160°F.
SECTION B - STAINLESS CONDENSING BOILER OPERATING WITH LOW TEMPERATURE HEATING DEVICE