BritTherm Domestic Pro Manual

Installation & Operating Instructions
Please read these instructions
carefully before installation
DP15

General Information..................................................................................3
Pump Liquid & Operating Conditions...................................................4
Pump Diagram............................................................................................5
Installation...................................................................................................6
Gaskets........................................................................................................7
Venting.........................................................................................................8
Control Panel.............................................................................................9
Pressure Curve.........................................................................................10
Operating Modes......................................................................................11
Fault Finding...............................................................................................12
Guarantees.................................................................................................13
Contents

General Information
These instructions guide you through the installation and
operation of this BritTherm™ Central Heating Circulator.
The Domestic Pro is a high efficiency Circulator which is
perfectly suited to operate in:
• Single zone heating systems
• Multi zone heating systems
• Underfloor heating systems
The Pump incorporates a permanent magnet motor with
differential pressure control which enables its performance
to be aligned with actual system demand.
It has a connection size of 1 ½”, a maximum head of 6
metres and a port to port distance of 130mm making it
perfect for domestic applications.

Pump Liquid & Operating Conditions
BritTherm™ Pumps require clean, thin, non-aggressive liquids
to operate correctly and prevent damage to their internal
components. The liquids used must not contain any solid
Liquids running through circulation pumps used on heating
systems must comply with the accepted standards of quality
especially in domestic applications.
Liquids that do not comply will void the warranty offered with
the circulation Pump.

Pump Diagram

Installation
Attention: Ensure the Pump is installed with
the motor shaft in the horizontal position.

Attention: The Pump liquid may be scalding
hot and under pressure. Before removing head
screws the system either requires draining, or
the Pump needs to be isolated.

Gaskets
Attention: Fit the two gaskets when the Pump
is mounted correctly between the flow and
return pipes.

Venting

Attention: The Pump liquid may be scalding
hot and under pressure so proceed with
caution when bleeding the Pump.

Find Pressure Curve on next page.
1. Screen showing actual working power
2. Light field indicating AUTO mode
3. Lowest manual speed option
4. Middle manual speed option
5. Highest manual speed option
6. Light field indicating NIGHT mode
7. Button for selecting NIGHT mode
8. Button for selecting each pump setting
9. CP1: Min. constant pressure curve
10. CP2: Max. constant pressure curve
11. PP1: Min. proportion pressure curve
12. PP2: Max. proportion pressure curve
Control Panel

Pressure Curve

I- (Minimum) the Pump runs at a constant fixed speed and therefore on
a constant curve.
II - (Medium) the Pump runs at a constant fixed speed and therefore on
a constant curve.
III - (Maximum) the Pump runs at a constant fixed speed and therefore
on a constant curve.
*Quick venting of the Pump can be achieved using speed III for a short
period.
AUTO - the power rises and falls in line with the system flow rate. *Ex
- factory setting.
(Night Mode) - the Pump reduces power automatically,
After 2 hours it drops to its minimum level (5-10 Watts).
*After 7 hours the pump reverts to its original setting.
PP1 - (Proportional Pressure 1) the duty point moves up/down on the
lowest proportional pressure curve. Head pressure is then reduced and
increased at falling and rising heating demand respectively.
PP2 - (Proportional Pressure 2) the duty point moves up/down on
thehighest proportional pressure curve. Head pressure is then reduced
and increased at falling and rising heating demand respectively.
CP1 - (Constant Pressure 1) the duty point of the Pump moves out or
in the constant pressure curve depending on heating demand. Head
pressure remains constant irrespective of heating demand.
CP2 - (Constant Pressure 2) the duty point of the Pump moves out or
in the constant pressure curve depending on heating demand. Head
pressure remains constant irrespective of heating demand.
Operating Modes

Fault Finding
Before starting any work on the pump please ensure the
electricity supply is turned off and cannot be accidentally
switched back on at any time
Fault Control Panel Cause Remedy
Pump doesn’t
run at all Light is off A) One fuse is
blown
Replace fuse
B) The current/
voltage operated
circuit breaker
has tripped out
Cut in the
circuit break
C) The Pump is
defective
Replace Pump
Only shows power A) Failure of
electricity supply,
might be too low
Check the
supply falls
within the
specified range
Noise in the
system
Light on for power
and pump settings
A) Air in the
system
Vent the
system
Reduce the
suction head
Noise in the
Pump
Light on for power
and pump settings
A) Air in Pump Let the Pump
run, it vents
itself over time
Increase the inlet
pressure. Check
the air volume in
the expansion
tank if installed
B) Inlet pressure
is too low
Light on for power
and pump setting
A) Pump
perfomance is
too low
Increase the
suction head
Insufficient
B) The flow is
too high

Guarantee Registration
Please retain your purchase invoice as it may be required
in the event of a guarantee claim.
This Pump is covered against manufacturing malfunction by a 6
year guarantee. The guarantee is only valid if the Pump has been
installed correctly, the system is maintained adequately, and the
guarantee is registered within 30 days of purchase.
The Pump is covered for a free of charge replacement should
malfunction occur within the first 3 years from the date of sale.
From 3 years and up to 6 years the Pump is covered for a
replacement at 50% of the original sale price.
To register go to www.BritTherm.co.uk and click
Register a Guarantee
Yo u will need:
• Date of purchase
• Address where pump is fitted
• Name of supplier
• Supplier invoice number
To make a claim please contact BritTherm by email in the first
instance: [email protected]