Lectrical Onnections; Relining - Goodman *MH8 Installation Instructions Manual

E E E E E C C C C C
L E C T R I C A L L E C T R I C A L L E C T R I C A L L E C T R I C A L L E C T R I C A L O N N E C T I O N S O N N E C T I O N S O N N E C T I O N S O N N E C T I O N S O N N E C T I O N S
F F F F F 4 - R 4 - R 4 - R
4 - R 4 - R
IX IX IX IX IX ELINING ELINING
ELINING ELINING ELINING
Relining options include B vent and flexible liners.
If the chimney has diagonal offsets, B vent probably cannot be
used.
If B vent is to be used, it must be supported adequately. Supports
(such as fire stops or thimbles) must be used to prevent the B vent
from coming into direct contact with the tile liner or chimney walls.
Direct contact would result in higher heat loss, with an increased
possibility of poor venting system performance.
It is not acceptable to vent one appliance inside the B vent and
other appliances outside. The excess space between the B vent and
the chimney walls must be covered at the top of the chimney by a
weatherproof, corrosion resistant flashing.
The B vent should then be topped with a listed vent cap. The listed
vent cap will, when installed per the manufacturer's instructions,
prevent problems due to rain, birds, or wind effects.
A B-vent installed as described in this section is considered to be an
enclosed vent system, and the sizing tables in National Fuel Gas
Code NFPA 54/ANSI Z223.1 - latest edition and in the National
Standard of Canada, CAN/CSA B149.1 and CAN/CSA B149.2 - latest
editions and amendments may be used.
If a flexible liner is to be used, it must be made of the proper mate-
rials:
• For most residential applications, an aluminum liner should
be acceptable.
• If the combustion air supplied to the furnace will be
contaminated with compounds containing chlorine or
fluorine, a liner of AL 29-4C stainless steel should be used.
Common sources of chlorine and fluorine compounds
include indoor swimming pools and chlorine bleaches,
paint strippers, adhesives, paints, varnishes, sealers, waxes
(which are not yet dried) and solvents used during
construction and remodeling. Various commercial and
industrial processes may also be sources of chlorine/
fluorine compounds.
• Heavier gauge 300 and 400 series stainless steel liners
were developed for use with oil or solid fuel appliances.
They are not suitable for use with gas-fired appliances.
Flexible liners specifically intended and tested for gas
applications are listed in the UL "Gas and Oil Equipment
Directory". (UL Standard 1777).
For sizing of flexible liners, see Note 22 and the tables in the Na-
tional Fuel Gas Code NFPA 54/ANSI Z223.1 - latest edition and in
the National Standard of Canada, CAN/CSA B149.1 and CAN/CSA
B149.2 - latest editions and amendments.
To install the liner, read and follow the liner manufacturer's instruc-
tions and your local codes. Excess liner length should be pulled out
of the chimney and cut off. Use caution when doing this, as the cut
edges of flexible liners may be sharp. Do not spiral excess liner
inside of the chimney. Support the liner as recommended by the
liner manufacturer.
Some manufacturers of flexible liners offer an insulation sleeve
designed to be added to the liner before it is installed in the chim-
ney. (Poured insulation, either vermiculite or other materials, is no
longer recommended.) Insulation will need to be added to the
flexible liner if:
• It is required by the liner manufacturer's instructions.
• The previous liner was properly sized and installed, and
suffered from condensation damage.
• It is required by your local building codes.
Even if none of those three conditions exist which require addi-
tional liner insulation, the installer may wish to consider it if:
• The local climate is very cold.
• The chimney is very tall.
• The vent connectors used are very long or have a large
number of elbows.
• Local experience indicates that flexible liners installed
without insulation are likely to have condensation
problems.
Insulation must be selected and installed in accordance with the
liner manufacturer's instructions.
Finally, cap the chimney and terminate the liner in accordance with
the liner manufacturer's instructions.
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LECTRICAL LECTRICAL LECTRICAL LECTRICAL LECTRICAL ONNECTIONS ONNECTIONS ONNECTIONS ONNECTIONS ONNECTIONS
HIGH VOLTAGE !
T
O AVOID THE RISK OF ELECTRICAL
THE UNIT MUST BE POLARIZED
HIGH VOLTAGE !
T
O AVOID PERSONAL INJURY
,
ELECTRICAL SHOCK DISCONNECT
BEFORE SERVICING OR CHANGING
.
WIRING
L
ABEL ALL WIRES PRIOR TO
. W
CONTROLS IRING ERRORS
. V
OPERATION ERIFY PROPER
HIGH VOLTAGE !
T
O AVOID THE RISK OF INJURY
,
DEATH THE FURNACE MUST
GROUNDED IN ACCORDANCE
,
THEIR ABSENCE WITH THE
N E C
ATIONAL LECTRIC ODE
14
WARNING
,
SHOCK WIRING TO
.
AND GROUNDED
WARNING
OR DEATH DUE TO
ELECTRICAL POWER
ANY ELECTRICAL
CAUTION
DISCONNECTION WHEN SERVICING
CAN CAUSE IMPROPER AND DANGEROUS
OPERATION AFTER SERVICING
WARNING
,
ELECTRICAL SHOCK OR
BE ELECTRICALLY
WITH LOCAL CODES OR IN
LATEST EDITION OF THE
.
.