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TECHNICAL DATA (a) General Information (b) ER-Series heating Models (or GX, CW, AL, SC) (c) Typical Arrangement of Heater 2 2 – 4 2. PACKAGING AND SHIPPING 4 – 5 3. MOUNTING CLEARANCES 5 – 6 4. PRE-ASSEMBLY 6 5. INSTALLATION 7 6. GAS CONNECTION 8 – 9 7. ELECTRICAL CONNECTION 10 – 11 8. VENT REQUIREMENT AND DETAILS (a) Unvented units (b) Vertical Vent (c) Horizontal Vent 12 – 13 9. FRESH AIR DUCTED INTAKE (a) Vertical Thru Roof (b) Horizontal Thru Wall 13 10. INSTALLATION CHECK OUT AND START UP 1