Insulation Test: Maintain the oven at a temperature of 260 C
4)
(500 F) for a minimum of 3 hours. The external surfaces of the
oven should not exceed 14 C (25 F) above ambient temperature.
5)
Uniform Temperature Test: Locate three thermometers or
thermocouples of known accuracy on an oven rack, one in the
center, and one at each end. With the oven empty, at room
temperature and doors closed, operate oven at 190 C (375 F)
for 1 hour. The difference between the three readings should
not exceed 1 C (1 F).
6)
Safety Test (Gas-fired Ovens): With oven operating set at
95 C to 205 C (200 F to 400 F), extinguish the pilot flame to
determine if the electronic flame failure protection system
controlling the main gas supply will sound a continuous alarm
and stop the flow of gas to the oven 2 to 4 seconds after flame
failure.
7)
Certification Compliance Examination: Certifications, certified
test reports, or listing marks for codes and standards, as
applicable, should be examined and validated as proof of
compliance.
a)
-
National Sanitation Foundation (NSF)
-
American Society for Testing and Material (ASTM)
-
Underwriters Laboratories (UL)
-
American Gas Association (AGA)
b)
Conformance to these standards should be evidence by seal,
label, stamp or certified test reports.
H.
Automatic Coffee Urns:
1)
Symbols
Item Description
K5411 ........Coffee Urn, Twin, Automatic, 23 L (6 Gallon),
Single Service
K5412 ........Coffee Urn, Twin, Automatic, 23 L (6 Gallon),
Double Service
K5413 ........Coffee Urn, Twin, Automatic, 45 L (12 Gallon),
Single Service
K5414 ........Coffee Urn, Twin, Automatic, 45 L (12 Gallon),
Double Service
K5415 ........Coffee Urn, Twin, Automatic, 75 L (20 Gallon),
Single Service
K5416 ........Coffee Urn, Twin, Automatic, 75 L (20 Gallon),
Double Service
2)
Visual Examination: Examination should be made of coffee urns
for the following defects.
a)
Materials not as specified, and obviously damaged,
defective, or not properly suited for the purpose intended.
b)
Component parts, assemblies, accessories, and spare parts
for units of the same classification are not
interchangeable.
11410.14