94
c. Panels covering control box, indoor fan, indoor fan m otor, gas compone nts (where applicable ), and com-
pressors shall have molded composite handles.
d. Handl es shall be UV modified, composite. permanently attac hed, and recessed into the panel.
e. Screws on the vertical portion of all removable access panel shall engage into heat resistant, molded compos-
ite collars.
f. Collars shall be removable and easily replaceable using manufacturer recommended parts.
23 81 19.13.I. N/A
23 81 19.13.J. Coils
1. Standard Aluminum /Copper Coil s: ( 04 --12 single com pressor/single stage cooling models only)
a. Standard e vaporator and condenser coils shall have aluminum la nced plate fins mechanically bonded to seam-
less internally grooved c opper tubes with all j oints brazed.
b. Evaporator coils shall be leak tested to 150 psig, pressure tested to 450 psig, and qualified to UL 1995 burst
test a t 1775 psig.
c. Condenser coils shall be leak tested to 150 psig, pressure tested to 650 psig, and qualified to UL 1995 burst
test a t 1980 psig.
2. Optional Pre--coated aluminum--fin condense r coils: (04 --12 singl e compre ssor/single stage c ooling mode ls only)
a. Shall have a durable epoxy --phenolic coating to provide protection in mildly corrosive coastal environments.
b. Coa ting shall be applied to the alumi num fin stock prior to the fin stamping process to create an inert barrier
betwee n the aluminum fin and copper tube.
c. Epoxy--phenolic barrier shall minimize galvanic action between dissimilar metals.
3. Optional Copper--fin evaporator and conde nser coils: (04 --12 single c ompressor/single sta ge cool ing model s only)
a. Shall be constructe d of copper fins mechanically bonded to copper tubes and copper tube sheets.
b. Galvanized steel tube sheets shall not be acceptable.
c. A polymer strip shall prevent coil assembly from contacting the sheet metal coil pan to minimize potential for
galvanic corrosion between coil and pan.
4. Optional E--coated aluminum--fin evaporator and condenser coils: (04 --12 single compressor/single stage cooling
models only)
a. Shall have a flexible epoxy polymer coating uniformly applied to all coil surface areas without mate rial
bridging between fins.
b. Coating process shall ensure complete coil encapsulation of tubes, fins and headers.
c. Color shall be high gloss blac k with gloss per ASTM D523--89.
d. Uniform dry film thickness from 0.8 to 1.2 mi l on all surface areas including fin edges.
e. Superior hardne ss cha racteristics of 2H per ASTM D3363--92A and cross--hatch adhesion of 4B--5B per ASTM
D3359--93.
f. Impact resistance shall be up to 160 in.--l b (ASTM D2794--93).
g. Humidity and water immersion resistance shall be up to minimum 1000 and 250 hours respectively (ASTM
D2247--92 and ASTM D870--92).
h. Corrosion durability shall be confirmed through testing to be no l ess than 1000 hours salt spray per ASTM
B117--90.
5. Standard Coils: (08 --14 t wo c ompressor models/t wo sta ge cooling models only)
a. Standard evaporator coils shall have aluminum lanced plate fins mechani call y bonded to seamless internally
grooved copper tubes with all joints brazed.
b. Evaporator coils shall be leak tested to 150 psig, pressure tested to 450 psig, and qualified to UL 1995 burst
test a t 1775 psig.
c. Standard condenser coils shal l have a ll aluminum NOVATIONt Heat Exchanger Technology design consist-
ing of aluminum multi port flat tube design and aluminum fin. Coils shall be a furnace brazed design and con-
tain epoxy lined shrink wrap on all aluminum to copper connect ions.
d. Conde nser coils shall be leak tested to 150 psig, pressure tested to 650 psig, and quali fied to UL 1995 burst
test a t 1980 psig.
6. Optional E--coated aluminum--fin, aluminum tube condenser coils:
a. Shall have a flexible expoxy polymer coating uniformly applied to all coil external surface areas without ma-
terial bridgi ng between fi ns or louvers.
b. Coa ting process shall ensure complete coil encapsulation, including all exposed fin edges.
c. E--coat thi ckness of 0.8 to 1.2 mil with top coat having a uni form dry film thickness from 1.0 to 2.0 mil on al l
external coi l surface a reas, including fin edges, shall be provided.
50TC
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