Duct Water Heater - SystemAir SAVE VTC 700 Betriebs- Und Wartungsanleitung

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connection board, then select DIGITAL OUTPUT 3 and select Step Controller Y4 Extra Controller from the
output type list.
5. Configure internal outdoor temperature sensor as extra controller temperature sensor. Go to Service menu. Select
Input menu. Select ANALOG tab. Select the ANALOG INPUT 1 and change its configuration from Outdoor Air Tem-
perature Sensor (OAT) sensor to Extra Controller Temperature Sensor (ECT).
6. After sensor configuration is changed select the Analog Input to which the newly installed duct temperature sensor
(OAT) is connected and configure it as Outdoor Air Temperature Sensor (OAT).
10.3.3

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 250-2 Water heating battery (2 rows) — 5460
• VBC 250-3 Water heating battery (3 rows) — 9843
• VAZ4 24A Actuator 0-10V (S) — 9862
• ZTV 15-1,6 2-way valve — 9824
• ZTR 15-1,6 valve 3-way — 9673
• Duct sensor -30-70C (SAT) — 211524
• Surface sensor -30-150C (FPT) — 211523
• PSS48 Transformer 24V — 204385
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.
211467 | A004
Fig. 5 Water heater connections
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Accessories |