Installation, Operating, Maintenance
and After Sales Manual.
Product Serial Number:
Part Number: 1371054
Issue 1
heatingthroughinnovation.
WHISPA III®5000 WM & 9000 WM
01.06.2009 ISSUE 1
Installation Date:
Tested to UL & CSA Standards
1.0 General Information 03
2.0 Heating System Design 03
3.0 Selection and Sizing for Heating 03
4.0 Location 03
5.0 Preparation 03
6.0 Electrical Connection 04
7.0 Water Connection 04
8.0 Technical Data 06
9.0 Operating Instructions 06
10.0 Troubleshooting 07
11.0 Maintenance 07
Contents
03
WHISPA III
®
5000 WM & 9000 WM
1.0 General Information
2.0 Heating System Design
G This MYSON recessed wall mounted WHISPA III®fan
convector is designed for recessed wall applications where
the use of surface mounted units would not be appropriate.
G MYSON WHISPA III
®
recessed wall fan convectors are
designed to be used with mono-flo Tees from a series loop,
on a two pipe system, or as a stand alone zone.
G Before proceeding with the installation, the heating system
design must be considered and the unit correctly sized to
meet the heat loss requirements of the room.
G WHISPA III
®
recessed wall fan convectors are supplied with a
fan speed selector switch.
G In heating mode a low limit thermostat prevents the fan from
operating if the heating system water temperature is below
110°F.
G WHISPA III
®
recessed wall units are not designed for use with
steam.
G WHISPA III
®
recessed wall units have different pipe centres
and wiring positions than previous WHISPA II
®
units.
This fan convector can be fitted on a series loop with mono-flo
or venturi Tees, on a two pipe system or as a stand alone zone.
For optimum fan convector heating performance the system
must be capable of providing sufficient hot water through the
heat exchanger. This means that:
1. Care must be taken in sizing both the pump and piping.
The minimum pipe size from boiler to fan convector must be
1
/2
"
copper tube.
2. Where the unit is fitted on to a system with other emitters,
mono-flo Tees or diverter Tees should be used to provide
adequate water flow.
3. The system water must be above 110°F for fan to switch on,
and for satisfactory operation the mean water temperature
should not be below 140°F.
4. Optimum performance will require effective balancing of the
whole system.
5. This unit should not be used to replace a radiator in an
existing system unless an adequate flow of water can be
guaranteed through the unit.
6. The loop must be pumped. WHISPA III
®
fan convectors are
not suitable for gravity circulation systems.
3.0 Selection and Sizing for Heating
G Heat output performance is given in the Technical Data
section of this manual.
G Since WHISPA III
®
recessed wall units are supplied with fan
speed control it is important to size the unit to match the
calculated heat loss requirements of the room with the unit
operating at the low fan speed.
G The higher fan speed can then be used for more rapid
heating from cold in extreme conditions.
G When establishing the temperature difference, i.e. entering
water to room temperature, allowance should be made for
temperature drop in the system. It is the water temperature
at the fan convector which dictates the output.
4.0 Location
G This WHISPA III®recessed wall unit is designed for recessed
wall applications.
G These units are designed for normal 2"x 4"stud wall framing,
with the
5
/
16
"
thick cover extending beyond the wall surface
once installed.
G The size of the opening required to be cut for installation is
shown in Fig 1.
1.02.03.0
4.0
5.0
5.0 Preparation
Before proceeding with the installation, unpack the carton
contents and check against the checklist below:
1. WHISPA III
®
recessed wall unit.
2. Instruction manual.
3. Front cover.
4. Screw fixing kit.
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