Danfoss WP75- RF User guide

7 day electronic WP75-RF programmable hot

water controller

Installation & User Instructions

®

Certification Mark

Index

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2

Installation

Product specification	3
Thermostat (WP75-RF) installation	4-5
Sensor (CS1) installation	5-7
Wiring	7
Commissioning	8
User
What is a Cylinder Thermostat?	9
Your programmer	10
How to read the display	10
Preset programmes	11
Resetting the unit	11
Setting the Time and Day	12
Running your programme	12
Before changing the preset programmes	13
Programming the unit (7-day mode)	14
Programming the unit (5/2-day mode)	15
Running your programme	16
BOOST function	17
Hot Water Available function	17-18
Changing clocks forward/back	18
Battery backup	19
Contact details	20

Installation Instructions

Please Note:

This product should only be installed by a qualified electrician or competent heating installer and should be in accordance with the current edition of the IEEE wiring regulations.

Product Specification

Thermostat features	WP75-RF
Power supply	2 x AA/MN1500/LR alkaline cells
Memory back-up	1 min for battery change
Transmission frequency (RF model)	433.92MHz
Transmitter range (RF model)	30m max
Max. ambient temperature	45°C
Temperature range	35 - 65°C
Dimensions, mm (W x H x D)	Unit - 110 x 88 x 28
	Remote Sensor - 48 x 48 x 45
Design standard	EN60730-2-9 (EN300220 for RF)
Ball hardness test	75°C
Control pollution situation	Degree 2
Time accuracy	± 1 min
Temperature accuracy	± 1°C

Important note RF products: Ensure that there are no large metal objects, such as boiler cases or other large appliances, in line of sight between the transmitter and receiver as these will prevent communication between thermostat and receiver.

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Installation

WP75-RF installation

Select a position for the WP75-RF that provides easy access to the unit (it could be used on a daily basis by the user, so the display needs to be clearly visible) and bearing in mind that the maximum distance between the thermostat and sensor is 10 metres.

Prepare the fixing position to provide access for the sensor cable through the rear of the wallplate.

If the cable is to be surface fixed note that it can only enter the WP75-RF from the bottom through the positions shown below.

Outline of entry

30mm min

Terminals

Wall or plaster	A B
box mounting
holes
Aperture for
rear entry

Clearance for

screwdriver access Knockout for bottom cable entry

Fix the wallplate so that the control module can be easily attached or removed. Make the sensor wiring connections as shown in the wiring diagram on page 7.

Before attaching the control module to the wallplate set the DIL switch, located in a recess on the rear of the module, to select whether the WP75-RF will be a 7 day controller or a 5/2 day (weekday/weekend) controller. Move both switches to

4the desired position.

Attach the control module to the wallplate by placing the slots in the top of the module over the lugs on the top edge of the wallplate and hinging down until the slot in the bottom edge of the module locates over the screw attached to the wallplate. Tighten the screw.

CS1 Sensor installation

Gas or Oil fired Boiler Systems

The sensor should be fitted to the side of the domestic hot water cylinder, half way up from the bottom.

For insulation thicker than 25mm and up to 55mm thick, use the extra cover supplied as a spacer to ensure that the sensor is held in firm contact with the cylinder wall.

1/2 cylinder height

IMPORTANT

1. Ensure cylinder wall is clean

2. Use heat transfer paste provided

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Select the fixing position and remove sufficient insulation to ensure that the sensor element can make close contact with the surface of the cylinder wall.

Clean away all traces of insulation and ensure both cylinder wall and sensor are clean.

Before mounting the sensor, coat the copper foil on the contact surface of the sensor with the heat conducting paste supplied. The sensor must be connected to the WP75-RF using double

insulated cable greater than 0.75mm2.

5

Connect the cable to the sensor terminals and replace the cover. Place the sensor on the cylinder and clamp tightly to the cylinder using the strap provided.

Cable entry is from behind if fitted to a single gang flush box, or from above, below or from the left if surface fixed cable is used.

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Fast Recovery Cylinder Heater Systems

The sensor should be fitted to the side of the domestic hot water cylinder just below the top seam.

Select the fixing position and remove sufficient insulation to ensure that the sensor element can make close contact with the surface of the cylinder wall (see opposite).

Clean away all traces of insulation and ensure both cylinder wall and sensor are clean.

For insulation thicker than 25mm and up to 55mm thick, use the extra cover supplied as a spacer to ensure that the sensor is held

in firm contact with the cylinder wall.

IMPORTANT

1. Ensure cylinder wall is clean

2. Use heat transfer paste provided

Before mounting the sensor, coat the copper foil on the contact surface of the sensor with the heat conducting paste supplied.