Flue System - Modine Manufacturing PDE Installation And Service Manual

Do not use a flue smaller than the flue pipe connection on the
unit. Flue should be stainless steel, aluminum or other suitable
corrosion resistant material.
Install with a minimum upward slope from unit of 20mm per
metre and suspend securely from overhead structure at points
no greater than 1 metre apart. For best flue operation, install
the vertical flue as close to the unit as possible. Avoid running
flue through unheated space when possible. When it does pass
through an unheated space, it is recommended that double
walled flue pipe is used. If single wall is used, insulate runs of
greater than 1.5m to minimize condensation. Use insulation that
is noncombustible with a rating of not less than 200°C.
Keep single wall flue pipe at least 150mm from combustible
material (see page 2 section 12 for permissible reductions). For
double wall pipe maintain clearances listed in manufacturer's
literature. The minimum distance from combustible material is
based on the combustible material surface not exceeding 70°C.
Clearance from the flue connector, or top of unit may be
required to be greater than the minimum clearance if heat
damage other than fire (such as material distortion or
discoloration) may occur. Where the flue passes through a
combustible floor or roof, a metal sleeve 100mm greater than
the flue diameter is necessary. If there is 2m or more of flue
pipe in the open space between the unit and where the flue
pipe passes through the floor or roof, the sleeve need only to be
50mm greater than the diameter of the flue pipe. If a sleeve is
not used, all combustible material must be cut away to provide
the specified clearance to combustibles. Any material used to
close the opening must be noncombustible.
The top of the vertical flue should extend at least 600mm above
the highest point where it passes through a roof and at least
600mm higher than any portion of a building within a horizontal
distance of 3m (see Figure 3).
Use a flue terminal to reduce downdraughts and moisture in the
flue.
Check flue system to see that combustion products are being
satisfactorily cleared. Operate unit for several minutes and then
pass a lighted match around the edge of the diverter relief
opening. If the flame is drawn into the opening, the system is
drawing properly. If not, make adjustments to provide adequate
draught.
A A D D D D I I T T I I O O N N A A L L R R E E Q Q U U I I R R E E M M E E N N T T S S F F O O R R F F L L U U E E I I N N G G I I N N T T O O A A N N
E E X X I I S S T T I I N N G G M M A A S S O O N N R R Y Y C C H H I I M M N N E E Y Y
In the case of brick or similar structures a stainless steel rigid or
flexible flue liner (grade 304/316) may be used in conjunction
F F i i g g u u r r e e 3 3
U U n n i i t t H H e e a a t t e e r r I I n n s s t t a a l l l l a a t t i i o o n n
APPROVED
TERMINAL
ROOF FLASHING
.635cm
UNIT
SLOPE TO
30.5cm
*SIZE ACCORDING TO EXPECTED SNOW DEPTH.
6 6
3.5m MIN.
TO WALL OR ADJOINING BUILDING
1 METER*
MIN.
USE THIMBLE
THROUGH CEILING
DRIP LEG WITH
CLEANOUT CAP
with a 50mm (minimum) thick layer of vermiculite or perlite
granules between the liner and the inner skin of the chimney
body. Liners should be sealed at both the top and the bottom.
In situations where a conventional flue is inappropriate, a flue
boost kit is available for all PDE models allowing up to 10
metres (or equivalent length) of horizontal flue.
2 2 . . 5 5 P P i i p p i i n n g g
CAUTION
!
Gas pressure to unit heater controls must never exceed
45mbar.
When leak testing the gas supply system, the appliance and
its combination gas control must be isolated during any
pressure testing in excess of 45mbar. The appliance should
be isolated from the gas supply system by closing the inlet
manual shutoff valve.
2 2 . . 6 6 G G a a s s S S u u p p p p l l y y
If there is any doubt regarding the capacity of the gas meter,
the available gas pressure, the adequacy of existing service
pipes or the size required for new service pipes then the advice
of the gas supplier should be requested. Installation pipework
should be fitted and tested for gas soundness in accordance
with BS. 6891 for small installations or IGEUP1 and IGEUP2 for
large installations.
The local gas supplier must be consulted if it is necessary to
employ a gas pressure booster.
An isolating union gas cock or union and isolating gas cock
M M U U S S T T be fitted before the inlet to the gas valve to allow
replacement of parts.
Before installation, check that the local distribution conditions,
nature of gas and pressure, and the current state of adjustment
of the appliance are compatible.
2 2 . . 7 7 E E l l e e c c t t r r i i c c a a l l S S u u p p p p l l y y
CAUTION
!
Disconnect power supply before making wiring connections
to prevent electrical shock and equipment damage. ALL
UNITS MUST BE WIRED STRICTLY IN ACCORDANCE
WITH WIRING DIAGRAM SUPPLIED WITH HEATER. ANY
WIRING DIFFERENCE FROM WIRING DIAGRAM MAY BE
HAZARDOUS TO PERSONS AND PROPERTY.
T T H H I I S S A A P P P P L L I I A A N N C C E E M M U U S S T T B B E E C C O O R R R R E E C C T T L L Y Y E E A A R R T T H H E E D D . .
A 230V~50 Hz mains supply is required, fused at 5 amps
(PDE 350 and 400 10 amps).
Wiring external to the appliance M M U U S S T T be in accordance with
I.E.E. (BS. 7671) Wiring Regulations and any local regulations
which apply.
The mains wiring to the appliance must be fixed, PVC insulated
and the wires should be between 1 and 2.5 mm
area.
The mains wiring inlet to the junction box is in the base of the
box and the installer MUST fit a suitable strain relief bush to this
hole.
2 cross sectional