H7245 UPC Site Prep & Installation Guide

This document, "H7245 Utility Port Conditioner Site Preparation and Installation Information," dated July 1991, provides detailed instructions and specifications for preparing a site and installing the H7245 Utility Port Conditioner (UPC) for all models of the VAX 9000 family of computer systems. It is primarily intended for Digital Site Preparation Engineers and Digital Installation Engineers, emphasizing that all procedures must be performed by trained personnel.

Key aspects covered include:

1. Introduction to the H7245 UPC: The UPC is a power conditioner that converts three-phase Y-connected AC utility power to a regulated 280V DC output (up to 20 kW) and provides auxiliary 208V AC for the system's battery backup units. It enhances power quality, features 100 ms ride-through capability, and modular hardware redundancy. Depending on the VAX 9000 configuration (210 or 400 platforms, including VP models), one or two UPCs may be required.

2. Site Preparation:

   • Physical Specifications: Details the UPC's dimensions (154 cm H, 78 cm W, 76 cm D) and significant weight (425 kg/935 lb), requiring at least two people to move. It specifies a minimum of 121.9 cm (48 inches) service clearance at the front and rear, and that the UPC must stand alone, not bolted to other cabinets.
   • Environmental Specifications: Lists recommended operating and non-operating temperature, humidity, dew point, and altitude ranges for optimal performance.
   • Electrical Specifications: Provides comprehensive data on electrical output power (280V dc, 20 kW rated output), and detailed AC input power requirements (voltage, frequency, phase, kVA, current, and hardware specifications) for various VAX 9000 models.
   • Grounding: Outlines requirements for the grounding conductor for the UPC AC supply.

3. Unpacking and Inspection: Guidelines for unpacking the UPC kit contents, including tools required and procedures for inspecting the cabinet for damage. This section also covers general hazard and safety considerations, such as electrostatic discharge (ESD) precautions, FCC compliance, and crucial safety rules (e.g., removing jewelry, proper grounding, always having two people for movement).

4. UPC Cable Installation: Step-by-step procedures for connecting the DC output, AC output, and signal cables from the UPC to the VAX 9000 IOA/IOB cabinets, specifying different cable types and connections for Model 200 and Model 400 configurations.

5. Powering Up the UPC: Details safety guidelines (e.g., specific training, never working alone), a comprehensive checklist of pre-power up checks (e.g., ensuring power is locked out, all circuit breakers are OFF, control panel settings), and the sequential power-up procedure, including verification via UPC indicators.

The document also includes appendices on recommended precautions against electrical accidents (detailing the physiological effects of current) and lockout/tagout procedures for safe energy isolation during maintenance.