Duct Water Heater - SystemAir SAVE VTC 200-1 Service & Accessories Installation Manual

3. Set the heater type: Components > Extra Controller > Extra Controller Mode > Heating.
4. Configure connection of the heater. Go to Service menu. Select Output menu. In next menu select DIGITAL tab.
Select the digital output to which the heater is connected. Example if it is connected to DO3 on the connection board,
then select DIGITAL OUTPUT 3 and select Step Controller Y4 Extra Controller from the output type list.
5. Configure the installed sensor. Go to menu Service > Input > ANALOG. Select the analog input to which the sensor
is connected. Example if it is connected to AI6 on the connection board, then select ANALOG INPUT 6 > Extra Con-
troller Temp. Sensor (ECT).
6.3.2

Duct water heater

A duct water heating battery is supposed to be installed in supply air duct.
• WH — water heating battery
• FPT — frost protection sensor
• SAT — supply air temperature sensor
• S — actuator for valve
• 1 — Outdoor air
• 2 — Supply air
• 3 — Extract air
• 4 — Exhaust air
Component/product — Article number:
• VBC 125-2 Water heating battery (2 rows) — 5457
• VBC 125-3 Water heating battery (3 rows) — 9839
• RVAZ4 24A Actuator 0-10V (S) — 9862
• ZTV 15-0,4 2-way valve — 9829
• ZTV 15-0,6 2-way valve — 6571
• ZTR 15-0,4 valve 3-way — 9670
• ZTR 15-0,6 valve 3-way — 6573
• Duct sensor -30-70C (SAT) — 211524
• Surface sensor -30-150C (FPT) — 211523
• Transformer 24V — 202692
Installation and connection
1. Install water heater in the duct. Connect pipes, 2/3–
way valve and actuator.
Important
Do NOT use 24V DC power output from the
connection board for valve actuator.
2. Connect actuator (S) to any free analog output.
3. The frost protection sensor (FPT) should be strapped on a surface on the return water pipe. Connect FPT sensor to
any free analog input.
4. An internal supply air temperature sensor (SAT, default connection AI2 on the main circuit board) must be replaced
by a duct temperature sensor which can be acquired as an accessory. A duct temperature sensor must be installed in
the duct after water heater. Connect the duct temperature sensor to analog input 2 (AI2) replacing the internal supply
air temperature sensor.
Note:
A duct temperature sensor can be connected to analog inputs 6–7 on the connection board for better
access and then configured as a supply air temperature sensor. However the internal supply air
temperature sensor must be disabled in the control panel first.
| v1
Accessories |
Fig. 9 Water heater connections
35