Installation
2)1&U-,0&1&,+
NOTE
đɇʪϑЇθʪϩ˵ʪѤͱиɇθθͱиͱϩ˵ʪɇθѣϩʪθϑΧͱϩ˝ϩͱиɇθʒϑϩ˵ʪʀͱ
ADJUSTMENT KNOB
FOR 1" OR 2" FILTER
ADJUSTMENT KNOB
FOR 1" OR 2" FILTER
Accessory Air Filter Box for 1” or 2” Air Filters. Filter Size Adjustment knob is on both sides.
FILTER BASE ASSEMBLY KIT MODEL NUMBERS - FIELD INSTALLED, PURCHASED SEPARATELY
VFB-1 – 16” X 20” X 2” Small Cabinet (12/18/24K)
VFB-2 – 20” X 20” X 2” Medium Cabinet (30/36K)
VFB-3 – 20” X 24” X 2” Large Cabinet (42/48K)
Arrangement:
Ƹϩϑϑ˵ΧΧʪʒ˙θͱϩ˵ʪ˙ɇʀϩͱθцɇθθɇ˝ʪʒϩͱɵʪϑϩɇʪʒɇЇΧѤͱиͱθ˵ͱθіͱϩɇʪ˙ϩ࣑θ˝˵ϩϩͱʪ˙ϩɇθѤͱи࣒Χͱϑϩͱ
Horizontal left means when the unit is laid on its side and you are facing the unit, the supply air opening is to the left and
ϩ˵ʪθʪϩЇθͱΧʪ˝ϑϩͱϩ˵ʪθ˝˵ϩƟ˵ʪϑʪͱʒʪϑɇθʪѣʪʒʀͱЭʪθϩɵʪϩͱɇ˵ͱθіͱϩɇθ˝˵ϩ࣑ʪ˙ϩϩͱθ˝˵ϩ࣒ɇθѤͱиΧͱϑϩͱ
θѤͱи θѤͱи
²ͱθіͱϩɇʪ˙ϩɇθθɇ˝ʪʪϩ
ƸΧѤͱиɇΧΧʀɇϩͱ
ÃɇЇΧѤͱиϑϩɇɇϩͱϩ˵ʪʒϑʀ˵ɇθ˝ʪͱЇϩʪϩϑɇϩϩ˵ʪϩͱΧAɇθʪϑ˵ͱЇʒɵʪϩɇʪϩͱϑЇθʪЇϩϑʪЭʪϩͱΧʪθϩΧθͱΧʪθ
ʀͱʒʪϑɇϩʪʒθɇɇ˝ʪĘͱθɇЇΧѤͱиϑϩɇɇϩͱиɵʪɇʀͱϑʪϩͱθɵɇϑʪʪϩÃ˙ϑϩɇʪʒɇʀͱϑʪϩࡥϩЇϑϩ˵ɇЭʪɇ
platform framed in. The platform must have an opening centered in the closet that measures at least 12 inches in height
˙θͱϩ˵ʪѤͱͱθѣϩʪθ˙θɇʪɇʒѣϩʪθʀɇɵʪЇϑʪʒϩ˵ɇϩʀͱЭʪθϑϩ˵ʪͱΧʪ˝ɇʒϑϑʪɇʪʒϩͱΧθʪЭʪϩɇθɵцࣛΧɇϑϑ˝ϩ˵ʪѣϩʪθ
ѣϩʪθ˝θʪʀɇɵʪЇϑʪʒϩ˵ɇϩϑͱʀɇϩʪʒɇϑʒʪϑʀθɵʪʒŵkƟƸŵĘÃŵŵkůƸÃŵkđkĘƟƊϑʪʀϩͱƟ˵ʪЇѣϩʪθϑіʪϑ
shown in the table below.
Ɗϩɇʒɇθʒϩ˵θͱиɇиɇцɇθѣϩʪθঃߥߢߢ˙ϩࢩͱθʪϑϑ
ťʪɇϩʪʒθϩʪθঃߧߢߢ˙ϩࢩͱθʪϑϑ
800 CFM = 20 x 20 x 1
1000 CFM = 20 x 25 x 1
1200 CFM = 20 x 30 x 1
1400 CFM = 25 x 30 x 1
1600 CFM = 25 x 30 x 1
1800 CFM = 30 x 30 x 1
2000 CFM = 30 x 40 x 1 or two 30 x 20 x 1
2400 CFM = 30 x 40 x 1 or two 30 x 20 x 1
800 CFM = 16 x 16 x 1
1000 CFM = 18 x 20 x 1
1200 CFM = 20 x 20 x 1
1400 CFM = 20 x 20 x 1
1600 CFM = 20 x 25 x 1
1800 CFM = 20 x 30 x 1 or two 20 x 15 x 1
2000 CFM = 20 x 30 x 1 or two 20 x 15 x 1
2400 CFM = 25 x 30 x 1 or two 14 x 30 x 1
ͱϩ˵ʪθͱΧϩͱϑϩͱЇϑʪϩ˵ʪϩʪθ9ɇϑʪʀʀʪϑϑͱθцçϩƟ˵ϑѣϩʪθɵɇϑʪϑΧɇʀʪʒͱϩ˵ʪʀͱϑʪϩѤͱͱθɇʒϑʪʀЇθʪʒиϩ˵ϑʀθʪиϑ
Ɵ˵ʪЇϩϑΧɇʀʪʒͱϩͱΧͱ˙ϩ˵ʪѣϩʪθɵɇϑʪɇʒϑʪʀЇθʪʒϩͱϩ˵ʪɵɇϑʪиϩ˵ϑʀθʪиϑƸϑʪϑʪɇϑϩθΧࡥϩɇΧʪͱθʀɇ˝ϩͱϑʪɇ
between the unit and the base.
Connect the supply air outlet to a plenum to the top of the unit and secure it with screws. Use a Non-tape sealant such as
mastic or an aerosol sealant to seal duct leakage. If installed in a basement, run supply and return duct work in accordance
with local codes. Use a Non-tape sealant such as mastic or an aerosol sealant to seal duct leakage.