Powrmatic OUH series User, Installation And Servicing Instructions

The OUH Range

CE

Users, Installation and Servicing

Instructions

WARNING: THIS APPLIANCE MUST BE EARTHED

OUH Range Users, Installation & Servicing Instructions Issue 4 March 2010

Certificate of Guarantee

Dear Customer

This is to certify that this appliance is guaranteed for two years including parts
and labour from the date of original commissioning.

The heat exchanger, where fitted, is guaranteed (parts only) for a further eight
years, chargeable on a sliding scale basis, price relative to age.

To make a claim

In the first instance you must contact your appliance supplier, or installer and
provide:-

1. The appliance type and serial number.

2. The original commissioning documentation.

3. As much detail as possible on the fault.
Your supplier, or installer will then contact Powrmatic to make a guarantee claim
on your behalf.

Conditions of Guarantee

1. The appliance must have been installed by a competent recognised installer,
and in accordance with the manufacturers instructions, building regulations
and local regulations.

2. The appliance has been professionally commissioned.

3. The appliance has been maintained on a yearly basis by a competent

servicing company.

4. The appliance has been used in accordance with the manufacturers

instructions.

5. The correct specification fuel has been used

6. No unauthorised repairs or modifications have been made.

7. Powrmatic ‘General Conditions of Sale’ have been observed.

8. Except for the obligation of Powrmatic Ltd to perform warranty repairs during
the guarantee period, Powrmatic will not be liable in respect of any claim for
direct or indirect consequential losses, including loss of profits or increased
costs arising from loss of use of the appliance, or any event arising there from.

Exclusions

1. Gaskets and fan belts are not included in the guarantee

Powrmatic Ltd, Hort Bridge, Ilminster, Somerset, TA19 9PS

tel: [phone] fax: [phone]

web: www.powrmatic.co.uk

Important: This certificate must

be kept with the appliance

Users Instructions

1. Checks before lighting the Air
Heater

The following preliminary checks should be made before lighting
the heater(s)
a) Ensure that the ELECTRICAL supply to the heater is

switched OFF.
b) Check that all warm air delivery outlets are open.
c) Check that the thermostat is set at MAX.
d) Check that the clock control is set to an ON period.
e) Check that any other controls are calling for heat.
f) Ensure that the Summer/Winter switch is in the Winter

position.
g) Check that the overheat reset button has not operated.

2. Lighting the Air Heater

NOTE: If it is not possible to light the heater after 2/3 attempts
contact the local service company.

1. Switch on the electrical supply at the isolator and the burner
start-up sequence will commence. The burner air fan will run
and after a pre purge period of approximately 30 seconds the
ignition spark will be generated and the oil valve opened.

The main burner will then start.
NOTE: If the burner fails to light it will go to lockout and the

lockout indicator / reset button on the burner control box will
be illuminated. To restart the burner push the lockout reset
button.

3. To Shut Down the Air Heater

3.1 For Short Periods:

Turn the room thermostat to the OFF or lowest setting.

3.2 For Long Periods:

Turn the room thermostat to the OFF or lowest setting.
Wait approximately 4-5 minutes for the main air fan of
the heater to stop running and the turn off the oil supplies

and electric supplies to the heater.

4. Description of Operation

Important: All heaters must be controlled by the fitted external
controls and not by use of the main switch in the electrical
supply to the heater.

The burner start up sequence will commence when the controls
e.g. Timeclock, room thermostat etc. call for heat. The burner
air fan will run and after a pre purge period the burner will light.

Approximately 2/3 minutes after the burner lights the heater
fan will automatically start. When the external controls are
satisfied the burner will be turned off and approximately 4/5
minutes later the heater fan will automatically stop.

4.1 Summer / Winter Modes

Certain types of external controls will provide for two modes
of operation i.e.

Summer: The heater fan alone will run at the dictate of the

external controls to provide air movement.

Winter: The heater will operate normally.

the fan will start and stop automatically in conjunction with the
burner. See Section 4.
ii) Limit Thermostat Reset
In the event of a fault that causes the temperature of the air

leaving the air heater to rise significantly e.g. Blocked air inlets,
the limit thermostat will operate to shut down the burner.
Remove the cause of the fault, wait 10 minutes and then reset
the thermostat by pushing the red reset button (Refer to Figure
below) .If the limit thermostat continues to operate turn off the
air heater and call a service engineer.

Limit Thermostat

PUSH TO

RESET

Red

reset

button

White

Fan

button

PUSH MAN

PULL AUTO

H on e yw ell

6. Maintenance

Regular servicing is essential to maintain efficient, reliable and
safe operation of the heater. Users are strongly recommended
to have the heater serviced by a qualified person at least annually
and preferably at the end of the heating season.

7. IMPORTANT

Free access must be maintained to and around the heater for
servicing purposes and the air supply to the heater must not be
restricted in any way. Combustible materials must not be stored
adjacent to the heater.

All Powrmatic OUH heaters use oil and electricity to power
them, they may also contain moving parts such as pulley belts.
It would be hazardous to tamper with or attempt to service unless
you are a competent person in the field of Oil and Electrical
work.
If you have any safety questions reference the servicing and
installation of any of our heaters please do not hesitate to contact
our head office for expert advice.
Your safety is paramount to us.

5. Fan and Limit Control

The fan and limit controls are mounted on the top of the air
heater.

i) Main Air Fan MAN / Auto
When the white button (Refer to Figure following) is pushed

in the fan will run continuously i.e not controlled by any external
controls e.g. Timeclock. When the white button is pulled out

Installation & Servicing Instructions

C O N T E N T S

Section Title Page

1 Introduction 1
2 Technical Data 2
3 General Requirements 4
4 Installation of Heater 5
5 Air Distribution System 7
6 Commissioning & Testing 7
7 Servicing 7
8 Wiring Diagram 9
9 Short List of Parts 9

Figure Title Page

1. Limit Thermostat 8

Table Title Page

1. Dimensions 3

2. Specifications 3

3. Electrical Loadings 1ph 3

4. Burner Settings - 35sec Oil 3

1. INTRODUCTION

The Powrmatic OUH Range is a range of oil fired forced
draught, closed flue, fanned circulation air heaters having an
output range of 20kW to 60kW .
The heaters are designed for suspension from suitable roof
points, or alternatively mounted on purpose designed wall
brackets, and are intended for heating commercial or
industrial premises.
The OUH-F has an axial type fan assembly fitted at the rear
of each heater to circulate the air being heated across the
combined combustion chamber/ heat exchanger. A centrifugal
fan variation is presented in the OUH-C range for ducted
applications. The OUH-D range, in having no fan fitted,
allows for ducted use where the air moving unit is remote
from the heater.
All units are fired with a forced draught packaged oil burner
complete with all necessary safety controls. Each air heater
must be connected to an individual closed flue system only.

1