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32

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

Printed in U.S.A. © 2002 by Lennox Hearth Products

P/N  850,014M  REV. R  06/2008

Lennox Hearth Products reserves the right to make changes at any time, without notice, in
design, materials, specifications, prices and also to discontinue colors, styles and products.
Consult your local distributor for fireplace code information.

1110 West Taft Avenue • Orange, CA  92865

Figure 67

Step 9. Reassemble all removed components
by reversing the procedures outlined in the
preceding steps.  Use pipe joint compound or
Teflon tape on all pipe fittings before installing
(ensure propane resistant compounds are used
in propane applications, do not use pipe joint
compounds on flare fittings).

Step 10.Attach the conversion label provided
in the conversion kit to the rating plate on the
appliance.

Step 11. Turn on gas supply and test for gas
leaks.

Figure 66

When reinstalling the ignitor assembly, use
extreme care to prevent damage and break-
age.  Do not apply any leverage to the ignitor
assembly while restoring the retainer clip to
its original position.

All Models

Step 8. Remove the burner orifice from the
manifold and replace it with the one pro-
vided with the kit. See the following table for
orifice sizes for natural and propane mod-
els

. Figure 67  illustrated the orifice.

Figure 65

Step 6. Electronic Appliances -

Honeywell Systems

See 

Figure 65  and the instructions provided

with the kit.  Remove the slotted cap screw,
o-ring, pressure-regulating adjusting screw
and spring.  Retain all parts for possible later
use.  Install new components from the kit.
Black cap and red spring for propane gas
units.  Silver cap and stainless steel spring
for natural gas units.  Before installing the
cap, attach manometer to the manifold side
pressure test fitting and adjust screw until
pressure reads 3.5 inches water column (0.87
kPa) for natural gas, and 10.0 inches water
column (2.49 kPa) for propane gas.

See 

Figure 66 and replace the pilot orifice as

follows:  Remove the ignitor assembly retainer
clip, and carefully remove the ignitor assembly.

Exercise extreme care to prevent damage to
or breakage of the ignitor assembly
.  Remove
the screw securing the pilot assembly to its
mounting bracket.  Back off the flare nut at the
end of the pilot gas line to free the pilot
assembly from the gas line.  Remove the pilot
orifice and replace it with the one provided
with the conversion kit.  Reinstall the pilot
assembly by reversing the steps detailed here.

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Spring

Adjusting
Screw

Slotted
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Manifold
Pressure
Test Port

Inlet Pressure Test Port

Note:
If the ignitor is damaged, a replacement kit is available - order Catalog Number 87L54.

Retaining
Clip

Ignitor
Assembly

Pilot
Assembly

Pilot

Orifice

Flare Nut

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

Summary of Contents for Direct Vent MPD-33 Series

Page 1: ...850 014CF Ce manuel d installation est disponible en francais simplement en faire la demande Num ro de la pi ce 850 014CF s l e d o M t l o v i l l i M s l e d o M c i n o r t c e l E M N C 8 2 3 3 T...

Page 2: ...ntsmanu facturedbySecurityChimneysInternationaland Z Flex Model GA Venting Systems listed to UL1777 and ULCS635 manufactured by Flex master Canada Limited These approved vent system components are lab...

Page 3: ...rving a separate solid fuel burning appliance These heater rated appliances are intended for use as supplemental heaters only Carbon Monoxide Poisoning Early signs of carbon monoxide poisoning are sim...

Page 4: ...ble 2 APPLIANCE AND VENT CLEARANCES The appliance is approved with zero clearance to combustible materials on all sides as de tailed in Table 2 with the following exception When the unit is installed...

Page 5: ...e and do not supersede local codes in any way Install vent according to local codes these instructions the current National Fuel Gas Code ANSI Z223 1 in the USA or the current standards of CAN CGA B14...

Page 6: ...or securing the glass door Remove the door by tilting it outward at the bottom and lifting it up Set the door aside protecting it from inadvertent damage See Figure 53 on page 24 The fireplace should...

Page 7: ...o t a l u g e r r e t e m t e e f 5 1 f o t h g i e h a n i h t i w m c 1 9 t e e f 3 y l b m e s s a r o t a l u g e r r e t e m e h t e v o b a t e e f 5 1 f o t h g i e h a n i h t i w m c 1 9 t e...

Page 8: ...MPD 4540 Models Dimensions D and F occur when one 45 degree elbow is connected directly to the appliance collar MPD and MPDR units D E F A B MPD and MPDT units o N l e d o M A B C D E 8 2 3 3 T D P M...

Page 9: ...3 8 1 5 4 6 1 1 1 6 2 8 7 4 3 6 1 7 7 1 9 3 9 3 6 1 m m 6 4 1 1 3 4 9 0 1 6 3 0 0 1 6 4 1 1 8 7 6 6 8 8 3 4 4 0 2 2 6 7 0 2 2 6 7 6 0 4 Step 3 INSTALL THE VENT SYSTEM General Information Theseinstruc...

Page 10: ...ALL AND SECURELY TIGHTEN COVER PLATE SCREWS COULD RESULT IN LEAKAGE OF FLUEPRODUCTSINTOTHELIVINGSPACE VENTCOVERPLATEANDVENTSEALPLATE MUSTREMAINSECURELYINSTALLEDON UNUSED VENT COLLAR FAILURE TO DO SO C...

Page 11: ...2 5 2 1 8 1 0 1 0 6 0 7 5 9 2 2 5 2 1 9 1 0 0 1 6 0 7 5 2 3 2 5 7 3 9 1 0 0 0 0 5 5 7 3 2 5 7 9 1 1 0 0 0 5 6 5 1 4 2 5 2 1 0 2 0 0 0 7 0 7 6 4 2 5 0 2 1 0 0 7 0 8 2 5 2 1 2 0 1 0 7 0 8 4 6 2 2 2 0 0...

Page 12: ...nd number of elbows required Refer to Vertical Vent Figures and Tables on page 14 and 15 to select the type of vertical installation desired Vent sections are available in net lengths of 4 1 2 114 mm...

Page 13: ...ction to align with the required direction of the next vent run element Twist elbow sections in a clockwise direction only so as to avoid the possiblity of unlocking any of the previously connected ve...

Page 14: ...ed then 4 feet mini mum V vertical vent will be required This table shows a 1 V to 2 H ratio For every 1 foot of V vertical you are allowed 2 feet of H horizontal run up to a maximum horizontal run of...

Page 15: ...V1 Ceiling Firestop Spacer SV4 5VF Wall Firestop Spacer SV4 5HF When using Secure Flex use Firestop Spacer SF4 5VF When using Secure Flex use Firestop Spacer SF4 5HF Example If20feetof H horizontalven...

Page 16: ...Push the vent component against the previous section until it fully engages then twist the component clockwise running the dimples down and along the incline channels until they seat at the end of th...

Page 17: ...the telescopic vent section SV4 5LA as the last vent section For wall thicknesses greater than that shown in Figure 32 refer to Table 4 on page 18 This table lists the additional venting components ne...

Page 18: ...level Note Secure Vent components rigid vent pipe and terminal are shown in the figures SecureFlexcomponents flexibleventpipeand terminal may also be used Note Two45degreeelbowsmaybeusedinplace ofone...

Page 19: ...s meters meters H1 V H Wall Firestop Spacer SV4 5HF Ceiling Firestop Spacer SV4 5VF When using Secure Flex use Firestop Spacer SF4 5HF When using Secure Flex use Firestop Spacer SF4 5VF Example If 20...

Page 20: ...feet of H horizontal run up to a maxi mum horizontal run of 20 feet An elbow is acceptable as 1 foot of vertical rise except where an elbow is the only vertical component in the system See Figure 35...

Page 21: ...with the inlets of the four incline channels of the last vent sectionorcollar Pushontheadapteruntilitfully engages then twist the adapter clockwise run ning the dimples down and along the incline chan...

Page 22: ...and Honeywell Millivolt Wiring See Figure 43 1 Select any of the following optional con trols appliance mounted rocker switch or wall mounted switch thermostat oroneofthe optional remote control kits...

Page 23: ...G e t i h W l a r t u e N OPENING CONTROL COMPARTMENT DOOR The millivolt control valve has a 3 8 10 mm NPT thread inlet port The electronic control valve has a 1 2 13 mm NPT thread inlet port and is f...

Page 24: ...he firebox floor to the door s vee flange Close both the latches securely Electronic Appliance Checkout To light the burner turn ON the optional remote wall switch and turn the gas control switch to t...

Page 25: ...N 8 1 2 3 p o r P 2 1 3 1 Figure 54 The adjustment rod and associated adjustable air shutter is patented technology Flame ad justments can be made quickly and accurately to taste without the need of...

Page 26: ...ent door Any hearth extension used is for appearance only and does not have to conform to standard hearth extension installation requirements Note Combustible wall finish materials and or surround mat...

Page 27: ...m 0 1 6 h c n i 4 2 n o i t c e S 3 7 L 7 7 6 3 L 5 4 V S t n e V m m 4 1 9 h c n i 6 3 n o i t c e S 4 7 L 7 7 8 4 L 5 4 V S t n e V m m 9 1 2 1 h c n i 8 4 n o i t c e S 5 7 L 7 7 A L 5 4 V S n o i...

Page 28: ...x e l F r o f n i m r e T l a c i t r e V n o i t c e s r e t p a d A x e l F h t i w 2 1 2 1 r a l l o c t r o p p u s f o o r t n e v d i g i r f o d n a g n i h s a l f f o o r y l b m e s s a r a...

Page 29: ...ecuring screws WARNING THIS CONVERSION KIT SHALL BE INSTALLED BY A QUALIFIED SERVICE AGENCY IN ACCORDANCE WITH THE MANUFACTURER S IN STRUCTIONS AND ALL APPLICABLE CODES AND REQUIREMENTS OF THE AUTHORI...

Page 30: ...re 61 s m e t s y S T I S t l o v i l l i M n o i s r e v n o C s a G e n a p o r P o T l a r u t a N s t i K s l e d o M e p y T t i n U o N g o l a t a C 8 2 3 3 T D P M 8 2 3 3 R D P M t l o v i l...

Page 31: ...On Any Side Of The Hex Fitting b Attach manometer to the manifold side pressure test fitting and verify manifold pres sure reads 3 5 inches water column 0 87 kPa for natural gas and 10 0 inches water...

Page 32: ...it Remove the slotted cap screw o ring pressure regulating adjusting screw and spring Retain all parts for possible later use Install new components from the kit Black cap and red spring for propane g...

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